baa UK /bɑː/US [bæ]exclamation 1noun 2verb 1forms 3 exclamation1 •The characteristic cry of a sheep or (broader) a sheep or goat. noun2 •The characteristic cry or bleating of a sheep or (broader) a sheep or goat. •The letter ب in the Arabic script. verb1 •To make the characteristic cry of a sheep or (broader) a sheep or goat.He treble baas for help, but none can get. — 1587 formsbaaed · baaing · baas