tester

/ˈtestə(r)/ (bre, ipa) · [tˈɛstɚ] /ˈtestər/ (ame, ipa) · [tˈɛstɚ] /ˈte-stər How to pronounce tester (audio)/ (ame, mw)

tester — noun

  • testersingular
  • testersplural

1. someone or a device used to check whether something works properly or reaches th

1.名詞B1
釋義

someone or a device used to check whether something works properly or reaches the required level

例句

Liang used a voltage tester before touching the broken kitchen wire.

compound noun: voltage tester

The company hired Beatriz as a software tester for its phone app.

同義詞
  • inspector

    usually a person checking quality, safety, or rules in an official role

  • checker

    a broader and more informal word, usually for a person rather than a device

  • meter

    a device that measures one specific thing, so it is narrower than tester

文法句型

[noun] tester

work as a tester

use a tester

用法筆記

Often follows a noun that names what is being checked, such as software tester or voltage tester. It can refer either to a person doing the checking or to a tool that measures or checks something.

常見錯誤

❌My sister is a math tester at school.
✅My sister is a math teacher at school.
💡A tester checks performance or quality; it does not normally mean a regular classroom teacher.
❌Use this tester to repair the socket.
✅Use this tester to check the socket first.
💡A tester measures or checks something; it does not usually fix it.

2. a small trial item in a shop that lets customers try something before buying the

2.名詞B1
釋義

a small trial item in a shop that lets customers try something before buying the regular size

例句

Mayumi picked up a shampoo tester from the shelf near the cashier.

compound noun: shampoo tester

The perfume counter set out a tester for each new summer scent.

retail pattern: set out a tester

同義詞
  • sample

    broader and often used for something sealed or given away, not only the display item

  • trial size

    specifically a small pack meant for short-term use

  • display bottle

    used especially for perfume or cosmetics in a shop

文法句型

[product] tester

try a tester

put out testers

用法筆記

Common in shops selling perfume, makeup, or skin-care products. A tester is the trial item on display, while a free sample is usually a sealed item that customers can take away.

常見錯誤

❌I bought the tester because it was the normal full bottle.
✅I bought the full bottle after trying the tester.
💡A tester is the trial item, not the regular packaged product.
❌The shop gave every customer an opened tester to keep.
✅The shop gave every customer a free sample to keep.
💡A tester usually stays in the shop; something taken home is more often called a sample.