Meaning of ‘Lurk’ in English

He felt someone was lurking outside his house in the dark.

Criminals may lurk in alleys, waiting for unsuspecting victims.

Online predators may lurk in chat rooms, posing as someone else.

The cat likes to lurk in the shadows before attacking its prey.

The detective believed the suspect might lurk near the crime scene.

A sense of danger made her feel that danger might lurk around every corner.