1. verb
If I had not snooped on her, I wouldnt have found out that she lied about her degree.
b) To secretly spy on or investigate, especially into the private personal life of others.
2. noun
a) The act of snooping
Be careful what you say around Gene because hes the bosses snoop.
b) One who snoops
She hired a snoop to find out if her husband was having an affair.
Wikipedia foundation.