What is the meaning of the word "baboonish"?

Definitions:

Can be used to describe physical characteristics or features that resemble those of a baboon, such as a protruding jaw or prominent canine teeth. ADJECTIVE
- With his hunched posture and gruff demeanor, he looked positively baboonish as he prowled through the room.
Could be used to describe someone or something that resembles or has characteristics similar to those of a baboon. ADJECTIVE
- His baboonish laughter echoed through the forest as he swung from branch to branch.