"backstops" in the noun sense
1. catcher, backstop
baseball) the person who plays the position of catcher
2. backstop
baseball) a fence or screen (as behind home plate) to prevent the ball from traveling out of the playing field
3. backstop
a precaution in case of an emergency
"he acted as a backstop in case anything went wrong"
"backstops" in the verb sense
1. backstop
act as a backstop
Source: WordNet® (An amazing lexical database of English)
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