unbeast noun 1verb 1forms 3 noun1 •Something which might be mistaken for, but which is not, a beast.That was no beast, said Irc scornfully into his mind. That was an unbeast. Twisty and nasty. Keep your eye out for more, Hem said. — 2010 verb1 •(rare) To get rid of the beastly form or nature of. formsunbeasted · unbeasting · unbeasts