forget

American  

[fer-get] / fərˈgɛt /

verb (used with object)

forgot, forgat, forgotten, forgot, forgetting

1. to cease or fail to remember; be unable to recall.

   to forget someone's name.

2. to omit or neglect unintentionally.

   I forgot to shut the window before leaving.

3. to leave behind unintentionally; neglect to take.

   to forget one's keys.

4. to omit mentioning; leave unnoticed.

5. to fail to think of; take no note of.

6. to neglect willfully; disregard or slight.

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verb (used without object)

forgot, forgat, forgotten, forgot, forgetting

1. to cease or omit to think of something.

idioms

1. forget oneself, to say or do something improper or unbefitting one's rank, position, or character.

forget British  

/ fəˈɡɛt /

verb

1. (when tr, may take a clause as object or an infinitive) to fail to recall (someone or something once known); be unable to remember

2. (tr; may take a clause as object or an infinitive) to neglect, usually as the result of an unintentional error

3. (tr) to leave behind by mistake

4. (tr) to disregard intentionally

5. (when tr, may take a clause as object) to fail to mention

6. 1. to act in an improper manner

   2. to be unselfish

   3. to be deep in thought

7. an exclamation of annoyed or forgiving dismissal of a matter or topic

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forget More Idioms  

More idioms and phrases containing forget

• forgive and forget

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Usage

Both forgot and forgotten are used as the past participle of forget : Many have already forgot (or forgotten ) the hard times of the Depression. Only forgotten is used attributively: half-forgotten memories.

Other Word Forms

• forgettable adjective
• forgetter noun
• unforgetting adjective

Etymology

Origin of forget

First recorded before 900; for- + get; replacing Middle English foryeten, Old English forg(i)etan; cognate with Old Saxon fargetan, Old High German firgezzan

Explanation

When you forget something, you can't recall or remember it. An actor who forgets his lines might need some helpful cues from the other actors on stage. You might forget on online password, or forget to return your library books. You can also deliberately forget something: "I've decided to forget about becoming rich and famous and focus on what I like to do." When you accidentally leave something behind, like your umbrella, you also forget it. The Old English root of forget is forgietan, "fail to remember or neglect inadvertently."

Example Sentences

As for reliable, timely detection of military diversions, forget it.

From The Wall Street Journal • Apr. 14, 2026

Telling residents in Moerdijk that their homes, streets and cemeteries may not survive the decade was, says Moerkerke, "the hardest decision of my career" and one he will never forget.

From BBC • Apr. 12, 2026

It was the first time I had a fan that I didn’t know personally, and I will never forget that.

From Los Angeles Times • Apr. 11, 2026

And we all know her first name, because she made sure we’d never forget.

From Salon • Apr. 11, 2026

We used to forget, we who loved him, what a shock the first sight of him could be to a stranger.

From "The Hiding Place" by Corrie ten Boom

Related Words

• fail
• ignore
• neglect
• overlook
• skip