American Dictionary

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Definition flat in American English

flat adverb

adverb
/flæt/
1

stretched out or lying on a surface

Example

Carole says she's not comfortable lying flat.

Example

We heard a bang and threw ourselves flat on the ground.

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2

singing or playing musical notes that are slightly lower than they should be

Example

Brenda has always sung terribly flat.

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3

exactly: used for emphasizing how quickly something is done

Example

I fell asleep in five seconds flat!

Synonyms and related words
Example

Her answers are flat wrong.

Example

We were flat broke at the time.

Synonyms and related words
Definition flat in American English