half-mast

half-mast — noun

IPA/ˌhɑːf ˈmɑːst/
IPA/ˌhæf ˈmæst/

1. the spot on a pole where a flag hangs when people are publicly mourning a death

1.nounB1
Definition

the spot on a pole where a flag hangs when people are publicly mourning a death or a terrible national event.

Example

The embassy flew its national flag at half-mast after the former president passed away.

collocation: fly + flag + at half-mast

Flags at half-mast across the capital marked a day of national mourning for the earthquake victims.

Common collocations
  • at half-mast
  • fly at half-mast
  • lower to half-mast
  • flags at half-mast
  • set at half-mast
Synonyms
  • half-staff

    Preferred in American English for flags on land-based poles, while half-mast is used for ships.

Antonyms
  • full mast

    The normal position of a flag at the top of the pole.

Grammar Patterns

at half-mast

Usage Note

The most common and traditional meaning. 'Mast' originally referred to a ship's mast, but the expression is now used for any flagpole. The flag is never flown at half-mast for happy events or celebrations.

Common Mistakes

The flag was at half-mast for the independence day parade.
The flag was at half-mast for the day of mourning.
Half-mast is only used for sadness and respect, never for celebration.

2. the halfway setting of a movable object such as a window covering or door, when

2.nounB2
Definition

the halfway setting of a movable object such as a window covering or door, when it is neither fully open nor fully closed.

Example

The window shade was stuck at half-mast, letting in a narrow strip of morning light.

Mei-Lin pulled the bamboo blinds to half-mast so the afternoon sun would not heat the room too much.

collocation: pull + blinds + to half-mast

Common collocations
  • at half-mast
  • pull to half-mast
  • leave at half-mast
  • stuck at half-mast
  • stop at half-mast

Grammar Patterns

at half-mast

Usage Note

This use is an informal metaphor that extends the flag imagery to everyday household objects. Very common with blinds, shutters, car windows, and garage doors.

3. the way trousers sit when the waistband is down near the hips instead of up at t

3.nounB2
Definition

the way trousers sit when the waistband is down near the hips instead of up at the waist, often done on purpose as a fashion style.

Example

The teenager's trousers were at half-mast, showing off a pair of bright yellow socks.

pattern: [possessive] + trousers + at half-mast

The school dress code clearly stated that trousers must not be worn at half-mast.

Common collocations
  • trousers at half-mast
  • pants at half-mast
  • jeans at half-mast
  • worn at half-mast
  • set at half-mast
Synonyms
  • sagging

    The standard modern term for wearing trousers below the waist; half-mast is more humorous or old-fashioned.

Grammar Patterns

trousers at half-mast

pants at half-mast

Usage Note

Informal and often used humorously or critically by older generations to describe a style where the waistband sits below the hips. The expression transfers the 'lowered flag' image to clothing that has slipped or is worn low.

Common Mistakes

She wore her skirt at half-mast.
He wore his trousers at half-mast.
This expression conventionally describes trousers or shorts, not skirts or dresses.

4. the way long trousers look when their legs finish somewhere between the knee and

4.nounB2
Definition

the way long trousers look when their legs finish somewhere between the knee and the ankle, instead of reaching the shoe.

Example

Sofia rolled up her jeans to half-mast so she could walk through the shallow stream without getting them wet.

verb pattern: roll up + clothes + to half-mast

The floodwaters had risen, so everyone kept their trousers at half-mast while wading through the street.

Common collocations
  • trousers at half-mast
  • jeans at half-mast
  • cut at half-mast
  • rolled to half-mast
  • became at half-mast
Synonyms
  • cropped trousers

    The standard fashion term for trousers that end above the ankle; more neutral than half-mast.

  • ankle-grazers

    A colloquial fashion term for intentionally short trousers.

Antonyms
  • full-length

    Trousers that reach all the way to the foot or shoe.

Grammar Patterns

trousers at half-mast

pants at half-mast

Usage Note

British-influenced usage. Can describe either a deliberate fashion choice (cropped/ankle-length trousers) or an accidental shortness (outgrown or poorly tailored clothing). This sense is different from sense 3 — here the waist is at the normal position but the legs are short.

half-mast — adverb

IPA/ˌhɑːfˈmɑːst/
IPA/ˌhæfˈmæst/

half-mast — adjective

IPA/ˌˈhɑːf.mɑːst/
IPA/ˈhæf.mæst/

half-mast — verb

Word family

Synonym discussion

Sense: noun/1

The main distinction is regional: 'half-staff' is the standard term in American English for flags on land-based poles (e.g., 'the governor ordered flags at half-staff'), while 'half-mast' is used for flags on ships. In British English, 'half-mast' is used for all flagpoles regardless of location. 'Lowered flag' is a general descriptive phrase without the ceremonial weight — it simply describes the physical position. 'Mourning flag' is not a fixed term but a contextual description used in news reports ('flags flew as a mourning flag'). For learners, the safest choice is 'at half-mast' (British) or 'at half-staff' (American), used with the verb 'fly' or 'hang'. Example: 'The White House flew the flag at half-staff for the former first lady.' (US) / 'Buckingham Palace flew the flag at half-mast.' (UK).

half-masthalf-stafflowered flagmourning flag

Common collocations

Phrases

  • fly at half-mast
  • hang at half-mast
  • lower to half-mast
  • set at half-mast
  • worn at half-mast

Prepositions

  • at half-mast
  • to half-mast

Etymology

Englishnautical Englishmodern English

The term 'half-mast' comes from nautical language, where 'mast' refers to the tall pole on a ship that holds the sails and flags. The practice of lowering flags to signal mourning dates back to at least the 17th century. According to tradition, the space at the top of the mast was left empty for the 'invisible flag of death.' The expression spread from ships to land-based flagpoles in the 18th and 19th centuries. By the 20th century, the word had also developed informal metaphorical uses for anything in a halfway position, from window blinds to trouser legs.

First known use

1800

1800, in the meaning defined above Verb