to please or gratify by compliments or attentions: I was flattered by their invitation.
7.
to feel satisfaction with (oneself), especially with reference to an accomplishment, act, or occasion: He flattered himself that the dinner had gone well.
8.
to beguile with hope; encourage prematurely, falsely, etc.
Origin: 1175–1225; Middle English flat(t)eren to float, flutter, fawn upon, Old English floterian to float, flutter; for sense development, compare flicker1, Old Norse flathra; reinforced by Old French flatter to flatter, literally, to stroke, caress (probably < Frankish *flat-flat1)
thrown down, laid low, or level with the ground, as fallen trees or buildings.
7.
having a generally level shape or appearance; not deep or thick: a flat plate.
8.
(of the heel of a shoe) low and broad.
9.
spread out, as an unrolled map or the open hand.
10.
deflated; collapsed: a flat tire.
11.
absolute, downright, or positive; without qualification: a flat denial.
12.
without modification or variation: a flat rate.
13.
Informal. lacking money; broke.
14.
without vitality or animation; lifeless; dull: flat writing.
15.
having lost its flavor, sharpness, or life, as wine or food; stale.
16.
(of a beverage) having lost its effervescence.
17.
without flavor; not spiced: flat cooking.
18.
prosaic, banal, or insipid: a flat style.
19.
pointless, as a remark or joke.
20.
commercially inactive: a flat day in the stock market.
21.
(of a painting) not having the illusion of volume or depth.
22.
(of a photograph or painting) lacking contrast or gradations of tone or color.
23.
(of paint) without gloss; not shiny; mat.
24.
not clear, sharp, or ringing, as sound or a voice.
25.
lacking resonance and variation in pitch; monotonous: a flat delivery of the speech.
26.
Music.
a.
(of a tone) lowered a half step in pitch: B flat.
b.
below an intended pitch, as a note; too low (opposed to sharp).
27.
Grammar. derived without change in form, as English to brush from the nounbrush and adverbs that do not add -ly to the adjective form as fast, cheap, and slow.
28.
Phonetics. lenis; voiced.
29.
Nautical. (of a sail)
a.
cut with little or no fullness.
b.
trimmed as nearly fore-and-aft as possible, for sailing to windward.
early 13c., from O.Fr. flater "to flatter," originally "stroke with the hand, caress," from Frank. *flat "palm, flat of the hand" (see flat (adj.)). Related: Flattered; flattering.