Masquerade \Mas`quer*ade"\, v. i. [imp. & p. p. {Masqueraded}; p. pr. & vb. n. {Masquerading}.] 1. To assemble in masks; to take part in a masquerade. 2. To frolic or disport in disquise; to make a pretentious show of being what one is not. A freak took an ass in the head, and he goes into the woods, masquerading up and down in a lion's skin. --L'Estrange.