back·stop 
/ˈbækˌstɑ:p/ noun
plural back·stops /ˈbækˌstɑ:p/ noun 1 [count] baseball a : a fence or screen that is placed behind the catcher to prevent the ball from rolling away
▪ The pitch got past the catcher and rolled all the way to the backstop.
b informal : catcher
▪ a talented backstop 2 [singular] Brit : something that is kept so that it can be used if it is needed
▪ kept some gold as a backstop in case the value of the local currency collapsed
▪ The pitch got past the catcher and rolled all the way to the backstop.
b informal : catcher
▪ a talented backstop
▪ kept some gold as a backstop in case the value of the local currency collapsed
