1. To assume a particular position, as for a portrait: pose, sit. SeePOSTURE. 2. To represent oneself in a given character or as other than what one is: attitudinize, impersonate, masquerade, pass, pose. Idioms: pass oneself off as. SeeHONEST. 3. To assume an exaggerated or unnatural attitude or pose: attitudinize, pose. Idioms: strike an attitude. SeePOSTURE.