1. Prétendre être celui ou celle que l'on n'est pas.
Les policiers nous parlaient d'adultes mal intentionnés qui chattent en se faisant passer pour des ados et qui tentent de nous inviter chez eux, [?].
(Armand Cabasson, La Reine des mots, Editions Flammarion, 2011, §.13)
2. [verb] (transitive) To pretend to be (a different person), to assume the identity of.
3. [verb] (obsolete) (transitive) To manifest in corporeal form; to personify.
4. [verb] Assume or act the character of; 'She impersonates Madonna'; 'The actor portrays an elderly, lonely man'.
5. [verb] Represent another person with comic intentions.
6. [verb] Pretend to be someone you are not; sometimes with fraudulent intentions; 'She posed as the Czar's daughter'.