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English definition of “sub”

sub

noun [C] uk   /sʌb/ us  

sub noun [C] (MONEY)

UK informal for subscription: Have you paid your tennis club sub yet?

sub noun [C] (CHANGE)

UK and US informal for substitute verb: One of the players was injured during the match, so a sub was brought on.

sub noun [C] (SHIP)

informal for submarine noun: a nuclear sub

sub noun [C] (BREAD)

US informal for submarine sandwich

sub

verb [I] uk   /sʌb/ (-bb-) us  
to replace someone, especially in a game of football: Travis subbed for the injured defender.
(Definition of sub noun, verb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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