noun.
A person who carries the professional title of sniper
noun.
A person using long-range small arms for precise attacks from a concealed position.
noun.
Any attacker using a non-contact weapon against a specific target from a concealed position.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a marksman who shoots at people from a concealed place
Word Usage
"And I think one of the reasons that the police are steadfastly avoiding the use of the term sniper is they don't want anyone to lock their mind into what they think a sniper is, and therefore, possibly not turn someone in to the police because he doesn't look like a sniper."