v. 1 chirp, tweet, cheep, squeak, twitter, pipe, chirrup The birds peeped excitedly when they saw the cat
n. 2 chirp, tweet, cheep, squeak, twitter, pipe, chirrup, chirr or chirre or churr The night was filled with the peep of the frogs at the pond 3 sound, complaint, outcry, protest, protestation, grumble, murmur The students didn't let out a peep when ordered to remain after class