Added 10 October 2026 linebacker noun Categories: PeopleActionsRare Words noun ! Definition from WordNet 3.1, Princeton University. More about linebacker at Wordnik → Where our words come from → A defensive football player who takes a position close behind the linemen. (American football) the position of a defensive football player who plays close behind the line of scrimmage. Origin From line + backer. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: athletejockchampiondefendersupporteradvocatelinebackingbacklinerslotbacksafetyfullback Back to today's word