Definition of "Flat" :

noun: a suite of rooms usually on one floor of an apartment house

noun: scenery consisting of a wooden frame covered with painted canvas; part of a stage setting

noun: a deflated pneumatic tire

noun: a shallow box in which seedlings are started

noun: freight car without permanent sides or roof

noun: a musical notation indicating one half step lower than the note named

noun: a level tract of land

"The salt flats of Utah."

adjective: commercially inactive

"Flat sales for the month."

adjective: not reflecting light; not glossy

"Flat wall paint."

adjective: having a relatively broad surface in relation to depth or thickness

"Flat computer monitors."

adjective: lacking the expected range or depth; not designed to give an illusion or depth

"A flat two-dimensional painting."

adjective: having a surface without slope, tilt in which no part is higher or lower than another

"A flat desk."

adjective: lacking contrast or shading between tones

adjective: horizontally level

"A flat roof."

adjective: stretched out and lying at full length along the ground

"Found himself lying flat on the floor."

adjective: sounded or spoken in a tone unvarying in pitch

adjective: (of a musical note) lowered in pitch by one chromatic semitone

"B flat."

adjective: not modified or restricted by reservations

"A flat refusal."

adjective: having lost effervescence

"Flat beer."

adjective: lacking stimulating characteristics; uninteresting

"A flat joke."

adjective: lacking taste or flavor or tang

adjective: flattened laterally along the whole length (e.g., certain leafstalks or flatfishes)

adverb: in a forthright manner; candidly or frankly

"Came out flat for less work and more pay."

adverb: with flat sails

"Sail flat against the wind."