- 1
Having no variations in height.
- The land around here is flat.
- 2
Having no variations in height.; In a horizontal line or plane; not sloping.
- a flat roof
- 3
Having no variations in height.; Smooth; having no protrusions, indentations or other surface irregularities, or relatively so.
- The surface of the mirror must be completely flat.
- The carpet isn't properly flat in that corner.
- 4
Having no variations in height.; Having small or invisible breasts and/or buttocks.slang
- Near-synonym: flat-chested
- That girl is completely flat on both sides.
- 5
Without variation in level, quantity, value, tone etc.
- The exchange rate has been flat for several weeks.
- 6
Without variation in level, quantity, value, tone etc.; At a consistently depressed level; consistently lacklustre.
- Sales have been flat all year, and we've barely broken even.
- 7
Without variation in level, quantity, value, tone etc.; Of fees, fares etc., fixed; unvarying.not-comparable
- a flat fee
- flat rates
- 8
Without variation in level, quantity, value, tone etc.; Without variations in pitch.
- He delivered the speech in a flat tone.
- 9
Without variation in level, quantity, value, tone etc.; Not diphthongal; without variation in height or backness.
- 10
Without variation in level, quantity, value, tone etc.; Without variation in tone or hue (uniform), and dull (not glossy).
- The walls were painted a flat gray.
syn. even · planar · plane · smooth · uniform · boring · dull · uninteresting · unfizzy
ant. bumpy · cratered · hilly · rough · wrinkled · sharp