Definition of "Peep" :
noun: a secret look
noun: the short weak cry of a young bird
verb: appear as though from hiding
"The new moon peeped through the tree tops."
verb: speak in a hesitant and high-pitched tone of voice
verb: make high-pitched sounds
verb: cause to appear
"He peeped his head through the window."
verb: look furtively
"He peeped at the woman through the window."