1.someone who prowls or sneaks about; usually with unlawful intentions
2.someone acting as an informer or decoy for the police
3.marked by quiet and caution and secrecy; taking pains to avoid being observed;
a furtive manner
1.to go stealthily or furtively;
..stead of sneaking around spying on the neighbor's house
2.put, bring, or take in a secretive or furtive manner;
sneak a look
3.make off with belongings of others
4.pass on stealthily;
He slipped me the key when nobody was looking