1. [Brit] A long queue of traffic back from some point
   "The accident caused a five-mile tailback on the motorway"
    
2. (American football) the position of the offensive back on a football team who lines up farthest from the line of scrimmage
   "The coach moved him from fullback to tailback"
    
3. (American football) the person who plays tailback
   "The tailback rushed for over 100 yards in the game"

Derived forms: tailbacks

Type of: back

Part of: eleven, football team

Encyclopedia: Tailback