sign

IPA/saɪn/
KK[sˈaɪn]IPA/saɪn/

sign — noun

  • signsingular
  • signsplural

1. a board, panel, or piece of material placed in a public place that carries writt

1.nounA1
Definition

a board, panel, or piece of material placed in a public place that carries written words, pictures, or symbols to give people information, directions, or warnings.

Example

Chidi read the road sign carefully before turning left at the junction.

collocation: road sign

A metal sign on the door said 'Staff Only — Please Do Not Enter.'

Common collocations
  • road sign
  • warning sign
  • exit sign
  • street sign
  • no-smoking sign
Synonyms
  • notice

    usually a piece of paper on a wall rather than a permanent board

  • signboard

    specifically a board with a name, product, or advertisement

  • placard

    a sign carried in a protest or march, not fixed to a building

Grammar Patterns

a/the sign + noun (signpost, signboard)

Usage Note

Often combined with a noun that describes the type of information (road sign, warning sign, exit sign, no-smoking sign).

Common Mistakes

I saw a signal on the door saying closed.
I saw a sign on the door saying closed.
a 'signal' is a sound, light, or movement; a 'sign' is a board with information.

2. a movement of a part of the body, especially the hand or head, that communicates

2.nounA2
Definition

a movement of a part of the body, especially the hand or head, that communicates a feeling, instruction, or message without using words.

Example

Quinn gave a thumbs-up sign to show that everything was going well.

collocation: thumbs-up sign

The librarian put a finger to her lips as a quiet sign to the noisy students.

Common collocations
  • give a sign
  • make a sign
  • thumbs-up sign
  • sign of agreement
Synonyms
  • gesture

    more general term for any body movement that expresses something

  • signal

    a pre-arranged movement that conveys a specific piece of information

  • motion

    a hand movement directing someone to do something, often used in traffic or theatre

Grammar Patterns

a sign of [emotion/intention]

verb + a sign (give/make a sign)

Common Mistakes

She made a signal to me from across the room.' (when meaning a hand gesture).
She made a sign to me from across the room.
'signal' often implies a pre-arranged or technical message; 'sign' is any everyday gesture.

3. a full communication system based on hand shapes, facial expressions, and body m

3.nounB1
Definition

a full communication system based on hand shapes, facial expressions, and body movements, used instead of spoken words mainly among Deaf people and those who interact with them.

Example

Jiwoo has been learning British Sign Language for two years to communicate with her Deaf colleague.

collocation: sign language

The school offers classes in sign for hearing parents of Deaf children.

sign (uncountable, meaning sign language)

Common collocations
  • in sign
  • sign language
  • learn sign
  • Deaf sign language
  • use sign

Grammar Patterns

in sign

sign language (as a noun modifier)

Usage Note

Uncountable in this sense. Use 'sign' alone (e.g. 'in sign', 'teaches sign') or 'sign language' (capitalised when referring to a specific system such as ASL or BSL).

Common Mistakes

He speaks sign language.
He uses sign language.' or 'He signs.
sign languages are not 'spoken'; they are signed or used.

4. a single hand shape or movement that forms a meaningful unit within a sign langu

4.nounB1
Definition

a single hand shape or movement that forms a meaningful unit within a sign language, standing for a specific word, letter, or idea.

Example

The sign for 'thank you' in British Sign Language involves touching your chin with your fingertips.

sign + for + [word]

Gabriel practiced the alphabet signs until he could fingerspell his own name smoothly.

Common collocations
  • sign for
  • learn a sign
  • make a sign
  • fingerspell a sign
Synonyms
  • hand sign

    more transparent term for non-specialist contexts

  • gesture

    broader — can mean any meaningful movement, not necessarily in a sign language system

  • fingerspelling

    specifically spelling words letter by letter using hand shapes

Grammar Patterns

a sign for [word/concept]

Usage Note

Distinguish from sense 3 (SIGN LANGUAGE — the language system as a whole). This sense refers to an individual gesture-unit within that system. The pattern 'the sign for [word]' is the most common frame.

5. an event, fact, or physical change that suggests that something is present, happ

5.nounA2
Definition

an event, fact, or physical change that suggests that something is present, happening, or will happen — for example, dark clouds as a sign of coming rain, or a fever as a sign of illness.

Example

Dark clouds are often a sign that a storm is on its way.

sign + that + clause

Lien showed no sign of nervousness before her piano performance.

show no sign of [noun]

Common collocations
  • sign of
  • sign that
  • show signs
  • no sign of
  • clear sign
  • early sign
Synonyms
  • indication

    slightly more formal; often used in academic or clinical contexts

  • symptom

    specifically a physical or mental sign of an illness or condition

  • evidence

    facts that prove something is true; stronger level of certainty than a sign

  • clue

    a piece of information that helps solve a problem or mystery

Grammar Patterns

a sign of [noun]

a sign that + clause

show signs of [noun]

Usage Note

Frequently used in the patterns 'a sign of something' and 'a sign that something is happening'. Also common in the negative phrase 'no sign of' meaning something is absent or not visible.

Common Mistakes

Dark clouds are the proof of rain.
Dark clouds are a sign of rain.
a 'sign' suggests something may happen; 'proof' is definite and certain.

6. a standardised mark, shape, or drawing on a page or screen that has a fixed conv

6.nounB1
Definition

a standardised mark, shape, or drawing on a page or screen that has a fixed conventional meaning, such as a plus sign (+) for addition or a pound sign (#) for number.

Example

The dollar sign ($) is used before amounts of money in the United States and several other countries.

collocation: dollar sign

In mathematics, the percent sign (%) means 'out of one hundred.'

collocation: percent sign

Common collocations
  • dollar sign
  • percent sign
  • plus sign
  • equals sign
  • at sign
Synonyms
  • symbol

    the most general term for any mark that represents something else

  • character

    a letter, number, or punctuation mark used in writing or computing

  • logo

    a symbol that represents a company or organization

Grammar Patterns

the sign for [concept]

[name of symbol] sign

Common Mistakes

What does this signal mean in the instructions?' (looking at a printed symbol).
What does this sign mean in the instructions?
a 'signal' is a sound, light, or electronic pulse, not a written symbol.

7. any of the twelve equal parts of the zodiac in astrology, each linked to a parti

7.nounB2
Definition

any of the twelve equal parts of the zodiac in astrology, each linked to a particular group of stars and believed by some to affect a person's character and fate based on their birth date.

Example

Constanza read her horoscope to see what the stars predicted for her sign that month.

collocation: star sign / zodiac sign

Iker laughed when his sister said his Virgo sign explained why he was so organized.

Common collocations
  • star sign
  • zodiac sign
  • birth sign
  • your sign
  • sign of the zodiac
Synonyms
  • star sign

    everyday term, more common in informal British English

  • zodiac sign

    slightly more formal or technical term

  • house

    a division of the zodiac in astrology, but not interchangeable in everyday use

Grammar Patterns

[adjective] sign

the sign of [zodiac name]

your sign

Usage Note

Commonly used in informal conversation ('What's your sign?') and in the pattern 'be a [zodiac name]' ('She is a Leo'). Also called a 'star sign'.

Common Mistakes

My star is Leo.
My sign is Leo.' or 'I am a Leo.
in astrology, you 'are' a sign, not a star.
Idioms

Something that shows what modern life is like, often in a negative way.

The empty shops in our town are a sign of the times.

Is the rise of online dating a sign of the times?

sign — verb

Word family

Synonym discussion

Sense: verb/1

All four words involve writing one's name, but they differ in context and scope. 'Sign' is the everyday verb for putting your name on any document, from a credit card receipt to a job contract — it is the only one used for confirming legal or financial agreements. 'Autograph' is specifically for celebrities signing something as a keepsake for a fan, not for official documents. 'Endorse' has two separate meanings: in finance, it means signing the back of a cheque so it can be cashed; in public life, it means giving public support to a product or candidate, often without actually writing anything. 'Countersign' is a formal, less common term for adding a second signature to a document already signed by someone else, as a confirmation or approval. For daily use: if you are just putting your name on a document, use 'sign'. If a famous person signs for a fan, use 'autograph'. If a public figure promotes a product, use 'endorse'.

Common collocations

Phrases

Prepositions

Etymology

LatinFrenchEnglish

The word 'sign' entered English through Old French 'signe', which came from Latin 'signum' meaning 'a mark, token, indication, or distinguishing feature'. In Latin, 'signum' could refer to a military standard, a seal, a signal, or even a constellation. The verb sense developed from the noun: 'to mark with a sign' gradually narrowed to 'to mark with one's signature' by the late Middle Ages. The modern noun senses — from a notice board to a zodiac division — all trace back to the core idea of something that points to or represents something else.