A thing or a person put in the rear or in the back of something to reinforce, hold, support. / A default arrangement that holds if all else fails. / (baseball) A wall or fence behind home plate.

(transitive) To serve as backstop for. / (transitive) To bolster, support.

plural of backstop

Third-person singular simple present indicative form of backstop

present participle of backstop

simple past tense and past participle of backstop

(UK) A proposed seamless border between Ireland and Northern Ireland in the event of Brexit.