at ‧ tack ‧ er /əˈtækə $ -ər/ BrE AmE noun [countable]
[ Word Family: noun : ↑ attack , ↑ counterattack , ↑ attacker ; verb : ↑ attack , ↑ counterattack ; adjective : attacking, counterattacking]
1 . a person who deliberately uses violence to hurt someone:
Her attacker then dragged her into the bushes.
a sex attacker
2 . a member of a sports team whose job is to move forward and try to score ↑ goal s or win points ⇨ defender