flat

nouns

a level tract of land
"the salt flats of Utah"
is a type of (narrower)
extensive tract of level open land
"they emerged from the woods onto a vast open plain"; "he longed for the fields of his youth"
a shallow box in which seedlings are started
is a type of (narrower)
a (usually rectangular) container; may have a lid
"he rummaged through a box of spare parts"
a musical notation indicating one half step lower than the note named
is a type of (narrower)
(music) notation used by musicians
freight car without permanent sides or roof
a deflated pneumatic tire
scenery consisting of a wooden frame covered with painted canvas; part of a stage setting
is a part of
arrangement of scenery and properties to represent the place where a play or movie is enacted
is a type of (narrower)
the painted structures of a stage set that are intended to suggest a particular locale
"they worked all night painting the scenery"
a suite of rooms usually on one floor of an apartment house
is derived from

adjectives

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"
is derived from
having a relatively broad surface in relation to depth or thickness
"flat computer monitors"
is derived from
is similar to
involving two dimensions
not modified or restricted by reservations
"a categorical denial"; "a flat refusal"
stretched out and lying at full length along the ground
"found himself lying flat on the floor"
lacking contrast or shading between tones
is derived from
antonym
domain category
the act of taking and printing photographs
(of a musical note) lowered in pitch by one chromatic semitone
"B flat"
antonym
antonym
domain category
an artistic form of auditory communication incorporating instrumental or vocal tones in a structured and continuous manner
flattened laterally along the whole length (e.g., certain leafstalks or flatfishes)
is derived from
lacking taste or flavor or tang
"a bland diet"; "insipid hospital food"; "flavorless supermarket tomatoes"; "vapid beer"; "vapid tea"
is derived from
lacking stimulating characteristics; uninteresting
"a bland little drama"; "a flat joke"
is derived from
having lost effervescence
"flat beer"; "a flat cola"
is similar to
not effervescent
sounded or spoken in a tone unvarying in pitch
"the owl's faint monotonous hooting"
is derived from
horizontally level
"a flat roof"
is similar to
parallel to or in the plane of the horizon or a base line
"a horizontal surface"
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"
is derived from
not reflecting light; not glossy
"flat wall paint"; "a photograph with a matte finish"
is derived from
commercially inactive
"flat sales for the month"; "prices remained flat"; "a flat market"
is similar to
(pathology) not progressing or increasing; or progressing slowly

adverbs

with flat sails
"sail flat against the wind"
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"