1 rare, historical To adorn, beautify; to titivate. Chiefly reflexive (used chiefly of men). Formerly also with † it, with reflexive meaning.
2 rare To adorn or beautify oneself; to primp. Used chiefly of men.
Early 17th century; earliest use found in Randle Cotgrave (fl. 1587–?1630), lexicographer. From French adoniser from Adonis, the name of Adonis, also as noun in sense ‘handsome young man’ (although this is first attested slightly later) + -iser.