n. One who or that which flattens or makes flat.n. Specifically A hammer with a broad face, used by smiths in working flat faces.n. In wire-drawing, a draw-plate with a flat orifice for drawing flat strips, as for watch-springs, skirt-wire, etc.n. Also flattener.To please or gratify, or seek to please or gratify, by praise, especially undue praise, or by obsequious attentions, submission, imitation, etc.; play upon the vanity or self-love of (a person) with a view to gain some advantage.To produce self-complacency or a feeling of personal gratification in; please; charm: as, to feel flattered by approval.To persuade of something which gives pleasure or satisfaction; give encouragement to; especially, to give pleasing but false impressions or encouragement to.To make appear better than the reality warrants: as, the portrait flatters its subject.To use language intended to gratify the vanity or self-love of a person; use undue praise.To flutter; float.