/ˈbækˌstɑːp/
NOUN
A person, structure, or arrangement that provides additional support, protection, or reinforcement when needed.
A person or thing that strengthens, supports, or reinforces another person, system, organization, or structure.
A financial, regulatory, or institutional safeguard that provides security against unexpected losses, failures, or crises.
Something that strengthens or provides additional credibility to a statement, explanation, or cover story.
NOUN
A wall, fence, or other structure positioned behind a playing area to stop balls or other objects from traveling beyond it.
A protective wall or fence behind the home plate in baseball that prevents missed or wild pitches and foul balls from reaching spectators or passing beyond the playing area.
NOUN
A defensive player positioned behind another player or a designated area to catch or stop balls during a game.
A player who occupies the catching position behind home plate and receives pitches from the pitcher.
The player positioned immediately behind the striking base to stop or catch balls during a game of rounders.
A player positioned behind the wickets to catch deliveries and prevent the ball from passing behind the stumps.
VERB
To act as a source of support, protection, or reinforcement for someone or something.
To provide additional assistance, reinforcement, or protection that helps maintain or strengthen a person, organization, system, or plan.