Definitions

1. noun

A person who snoops or spies on others, often in a sneaky or underhanded manner.

“She was caught acting as a snooper by the management, who suspected her of stealing company secrets.”

2. verb

To snoop or spy on someone or something in a sneaky or underhanded manner.

“The kids were snooping around the neighbor’s yard, looking for something to do on a rainy day.”