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US/flæt/
UK/flæt/
lying straight against a surface; also completely, or exactly when talking about time
In context
Lie flat on your back and breathe slowly through your nose.
He ran the five kilometres in twenty minutes flat.
She turned the offer down flat without even reading it.
Words that go with flat
verb + adverb
- lie flatFold the map so it can lie flat on the table.
- fall flatHis jokes fall flat because nobody understands them.
- lay flatLay the clothes flat to dry so they keep their shape.
- turn down flatI asked for a pay rise, but the manager turned me down flat.
- work flat outWe've been working flat out to finish the project on time.
adverb + adjective
- flat brokeI'm flat broke until payday.