—v.intr.
1 pry into matters one need not be concerned with.
2 (often foll. by about, around) investigate in order to find out transgressions of the law etc.
—n.
1 an act of snooping.
2 a person who snoops; a detective.
Derivatives:
snooper n. snoopy adj.
Etymology: Du. snoepen eat on the sly
Useful english dictionary. 2012.