peep-v; 3 Senses

Sense Number 1: Look furtively at something.

He peeped at the woman through the window.
We peeped at the professor through her office window.
Stop peeping at me!

VerbNet: peer-30.3
FrameNet: Perception_active
PropBank: peep.02
WordNet 3.0 Sense Numbers: 1

Sense Number 2: (Cause to) appear as if from hiding.

He peeped his head through the window.
The new moon peeped through the tree tops.
He peeped through the bushes.

VerbNet: NM
FrameNet: NM
PropBank: NM
WordNet 3.0 Sense Numbers: 2, 5

Sense Number 3: Speak in a high-pitched tone of voice, as either an animal or human might.

The birds peeped loudly in the bushes.
The teacher practically peeped at us from the blackboard.
He peeped throughout the meeting, lacking confidence.

VerbNet: animal_sounds-38
FrameNet: Make_noise,Cause_to_make_noise
PropBank: peep.01
WordNet 3.0 Sense Numbers: 3, 4