What is the meaning of Sniper?

A person using long-range small arms for precise attacks from a concealed position.

A sniper rifle.

Any attacker using a non-contact weapon against a specific target from a concealed position.

One who shoots from a concealed position.

One who criticizes; a person who frequently snipes at others.

A hunter of snipe (the bird).

A player who specializes in scoring goals.

A person or automated process set up by a person who or which attempts to win an online auction by placing a bid only seconds before the auction ends, leaving no time for other bidders to respond

sniper (person, weapon)

plural indefinite of snipe

sniper (person using long-range small arms for precise attacks from a concealed position)

sniper rifle

Source: wiktionary.org