different between mannerism vs personalitytrait

English

manner +? -ism

mannerism (plural mannerisms)

A noticeable personal habit, a verbal or other (often, but not necessarily unconscious) habitual behavior peculiar to an individual.
Exaggerated or affected style in art, speech, or other behavior.

From Italian manierismo, from maniera, coined by L. Lanzi at the end of the XVIII century.

mannerism (countable and uncountable, plural mannerisms)

(art, literature) In literature, an ostentatious and unnatural style of the second half of the sixteenth century. In the contemporary criticism, described as a negation of the classicist equilibrium, pre-Baroque, and deforming expressiveness.
(art, literature) In fine art, a style that is inspired by previous models, aiming to reproduce subjects in an expressive language.

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