What is the meaning of flatter?

verb

• Praise somewhat dishonestly.
  • synonyms: blandish

adjective

• Having a surface without slope, tilt in which no part is higher or lower than another.
  • usage: "a flat desk"; "acres of level farmland"; "a plane surface"; "skirts sewn with fine flat seams"
  • synonyms: flat, level, plane
• Having a relatively broad surface in relation to depth or thickness.
  • usage: "flat computer monitors"
  • synonyms: flat
• Not modified or restricted by reservations.
  • usage: "a categorical denial"; "a flat refusal"
  • synonyms: categoric, categorical, flat, unconditional
• Stretched out and lying at full length along the ground.
  • usage: "found himself lying flat on the floor"
  • synonyms: flat, prostrate
• Lacking contrast or shading between tones.
  • synonyms: flat
• Of a musical note. ( lowered in pitch by one chromatic semitone)
  • usage: "B flat"
  • synonyms: flat
• Flattened laterally along the whole length (e. G., certain leafstalks or flatfishes.
  • synonyms: compressed, flat
• Lacking taste or flavor or tang.
  • usage: "a bland diet"; "insipid hospital food"; "flavorless supermarket tomatoes"; "vapid beer"; "vapid tea"
  • synonyms: bland, flat, flavorless, flavourless, insipid, savorless, savourless, vapid
• Lacking stimulating characteristics; uninteresting.
  • usage: "a bland little drama"; "a flat joke"
  • synonyms: bland, flat
• Having lost effervescence.
  • usage: "flat beer"; "a flat cola"
  • synonyms: flat
• Sounded or spoken in a tone unvarying in pitch.
  • usage: "the owl's faint monotonous hooting"
  • synonyms: flat, monotone, monotonic, monotonous
• Horizontally level.
  • usage: "a flat roof"
  • synonyms: flat
• Lacking the expected range or depth; not designed to give an illusion or depth.
  • usage: "a film with two-dimensional characters"; "a flat two-dimensional painting"
  • synonyms: two-dimensional, 2-dimensional, flat
• Not reflecting light; not glossy.
  • usage: "flat wall paint"; "a photograph with a matte finish"
  • synonyms: flat, mat, matt, matte, matted
• Commercially inactive.
  • usage: "flat sales for the month"; "prices remained flat"; "a flat market"
  • synonyms: flat

adverb

• With flat sails.
  • usage: "sail flat against the wind"
  • synonyms: flat
• In a forthright manner; candidly or frankly.
  • usage: "he didn't answer directly"; "told me straight out"; "came out flat for less work and more pay"
  • synonyms: directly, flat, straight