linebacker

Noun linebacker has 2 senses

• linebacker(n = noun.person) line backer - a defensive football player who takes a position close behind the linemen;
is a kind of football player, footballer

• linebacker(n = noun.act) line backer - (American football) the position of a defensive football player who plays close behind the line of scrimmage;
is a kind of back
is a member of eleven, football team