Baa/bɑː/ Definition 1 of 2Pro Tip 1/3Emotion Expression Used to describe sheep's emotions, like distress or contentment. When lost, the lamb started to baa frantically. Pro Tip 2/3Onomatopoeic Usage Imitates the actual sound of sheep, often used in children's books. Each page had a button that, when pressed, made a 'baa' sound. Pro Tip 3/3Describing Volume Use with adverbs to depict the loudness or softness of the sheep's vocalization. The lamb would baa softly when it nuzzled its mother.