S: (n) flat (scenery consisting of a wooden frame covered with painted canvas; part of a stage setting)
S: (n) apartment, flat (a suite of rooms usually on one floor of an apartment house)
Adjective
S: (adj) flat, level, plane (having a surface without slope, tilt in which no part is higher or lower than another) "a flat desk"; "acres of level farmland"; "a plane surface"; "skirts sewn with fine flat seams"
S: (adj) flat (having a relatively broad surface in relation to depth or thickness) "flat computer monitors"
S: (adj) two-dimensional, 2-dimensional, flat (lacking the expected range or depth; not designed to give an illusion or depth) "a film with two-dimensional characters"; "a flat two-dimensional painting"
S: (adj) flat, mat, matt, matte, matted (not reflecting light; not glossy) "flat wall paint"; "a photograph with a matte finish"
S: (adj) flat (commercially inactive) "flat sales for the month"; "prices remained flat"; "a flat market"
Adverb
S: (adv) flat (with flat sails) "sail flat against the wind"
S: (adv) directly, flat, straight (in a forthright manner; candidly or frankly) "he didn't answer directly"; "told me straight out"; "came out flat for less work and more pay"