[flat] adj flat.ter ; flat.test [ME, fr. ON flatr; akin to OHG flaz flat, and prob. Gk platys broad--more at place] (14c) 1 a: lying at full length or spread out upon the ground: prostrate b: utterly ruined or destroyed c: resting with a surface against something
2. a: having a continuous horizontal surface b: being or characterized by a horizontal line or tracing without peaks or depressions "a ~ EEG"
3: having a relatively smooth or even surface
4: arranged or laid out so as to be level or even
5. a: having the major surfaces essentially parallel and distinctly greater than the minor surfaces "a ~ piece of wood" b of a heel: very low and broad
6. a: clearly unmistakable: downright "a ~ denial" b (1): not varying: fixed "a ~ rate" (2): having no fraction either lacking or in excess: exact "in a ~
10. seconds" (3) of a frequency response: not varying significantly throughout its range
7. a: lacking in animation, zest, or vigor: dull "life seemed ~ without her" b: lacking flavor: tasteless c: lacking effervescence or sparkle "~ ginger ale" d: commercially inactive; also: characterized by no significant rise or decline from one period to another "sales were ~" e of a tire: lacking air: deflated f chiefly Brit, of a battery: dead 3c, discharged
8. a (1) of a tone: lowered a half step in pitch (2): lower than the proper pitch b of the vowel a: pronounced as in bad or bat
9. a: having a low trajectory b of a tennis stroke: made so as to give little or no spin to the ball
10. of a sail: taut 11 a: uniform in hue or shade b: having little or no illusion of depth c of a photograph or negative: lacking contrast d of lighting conditions: lacking shadows or contours e: free from gloss "a ~ paint" f: two-dimensional
2. 12: of, relating to, or used in competition on the flat "a ~ horse" syn see level, insipid -- flat.ly adv -- flat.ness n -- flat.tish adj
flat n (14c) 1 a: a level surface of land--usu. used in pl. "sagebrush ~s" "tidal ~s" b: a stretch of land without obstacles; esp: a track or course for a flat race--usu. used with the "has won twice on the ~"
2: a flat part or surface "the ~ of one's hand" 3 a: a musical note or tone one half step lower than a specified note or tone b: a character on a line or space of the musical staff indicating a half step drop in pitch
4: something flat: as a: a shallow container for shipping produce b: a shallow box in which seedlings are started c: a flat piece of theatrical scenery d: a shoe or slipper having a flat heel or no heel
5. chiefly Brit: an apartment on one floor
6: a deflated tire 7: the area to either side of an offensive football formation flat adv (1531) 1: in a flat manner: directly, positively
2: in a complete manner: absolutely "~ broke"
3: below the proper musical pitch
4: without interest charge; esp: without allowance or charge for accrued interest "bonds sold ~" flat vb flat.ted ; flat.ting vt (ca. 1604) 1: flatten
2: to lower in pitch esp. by a half step ~ vi: to sing or play below the true pitch