Meaning ofbackstopin English

Noun

1. a reinforcement behind something; for support
   The government will act as a backstop for the struggling company.
2. a default plan; if all else fails
   In case of emergency, we have a backstop plan to ensure everyone's safety.
3. a wall behind home plate (in baseball)
   The backstop behind home plate protects the catcher from wild pitches.
4. the catcher position (in baseball)
   The team's backstop made a crucial catch to save the game.