having a level surface; without raised areas or indentations

he sat down on a flat rock

trim the surface of the cake to make it completely flat

lacking emotion; dull and lifeless

‘I'm sorry,’ he said, in a flat voice

(of a sparkling drink) having lost its effervescence

she sipped some of the flat champagne

(of a fee, wage, or price) the same in all cases, not varying with changed conditions or in particular cases

a flat fare of £2.50

(of musical sound) below true or normal pitch

relating to flat racing

the Flat season

lower (a note) by a semitone

when a person has a poor ear for music, he will flat and sharp right along without knowing it

make flat; flatten

flat the loaves down

live in or share a flat

Zoë flats in Auckland