Word parts attack + -er Pronunciation IPA (key): /əˈtækɚ/ Audio (US)(file) Noun Singular attacker Plural attackers (countable) An attacker is someone who attacks someone else, usually out of violence. A hacker is an attacker that tries to enter other people's systems illegally. (countable) (sports) An attacker is a player who tries to score goals or points for their own team. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads