backstop (baseball)
Baseball term for the fence or net behind home plate that stops wild pitches and foul balls.
See also: バックネット
The ball hit the backstop and bounced back.
rear protection; safeguard at the back
General term for something that provides protection or support from behind, often used in military or organizational contexts.
They provide rear support as the unit's backstop.
assistant; lieutenant; right-hand person
Refers to a trusted deputy or second-in-command who supports a leader, often in business or political settings.
As the president's lieutenant, the vice president plays an important role.