A level, even surface without raised areas or indentations. adjective
The table has a flat surface.
She prefers to sleep on a flat mattress.
An apartment or a suite of rooms on one floor forming a residence. noun
They live in a small flat in the city.
The building has several flats for rent.
Lacking interest, excitement, or energy; dull and lifeless. adjective
The party was quite flat without music.
His voice sounded flat during the presentation.
Completely or absolutely; used for emphasis. adverb
She turned him down flat.
He flat refused to go to the meeting.
A musical note that is a semitone lower than a given note. noun
The song is in B flat major.
She played an E flat on the piano.
A tire that has lost air, making it unusable. noun
I had to change the flat tire on the highway.
The car has a flat, so we need to fix it before driving.
To make something flat or flatter. verb
She used a rolling pin to flat the dough.
The landscaper will flat the ground before planting.