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

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

the flat part of something

she placed the flat of her hand over her glass

an upright section of stage scenery mounted on a movable frame

a flat tyre

I've got a flat—there were nails under the wheel

flat racing

a musical note lowered a semitone below natural pitch

live in or share a flat

Zoë flats in Auckland

a set of rooms forming an individual residence, typically on one floor and within a larger building containing a number of such residences

a block of flats