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Meaning of “sub” in the English Dictionary

"sub" in British English

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subnoun [C]

uk   /sʌb/  us   /sʌb/ informal
  • sub noun [C] (SANDWICH)

US a long, thin loaf of bread filled with meat or cheese, and often lettuce, tomatoes, etc: a meatball sub

subverb

uk   /sʌb/  us   /sʌb/ (-bb-) informal
[I] in sports, to play in a match in someone's place: Travis subbed for the injured defender.
[I] US to do a job temporarily when someone else cannot do it: As a young player, he subbed for Duke Ellington's drummer. I subbed as a teacher for a semester.
[T] UK to replace one player with another during a game: He was subbed in the match against Newcastle.

sub-prefix

uk   /sʌb-/  us   /sʌb-/
  • sub- prefix (LESS THAN)

less than a number or level: Winter weather brought sub-zero (= less than 0 degrees) temperatures to much of the country. smart TVs in the sub-$1000 price range the first man to run a sub-4 minute mile
  • sub- prefix (LOWER)

below or in a lower position: the subarctic a sub-layer
  • sub- prefix (LESS GOOD)

not as good as: subhuman a sub-standard effort The film is a sort of sub-Godfather mafia family tale.
(Definition of sub from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"sub" in American English

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subnoun [C]

 us   /sʌb/
  • sub noun [C] (REPLACEMENT)

short form ofsubstitute teacher
  • sub noun [C] (SHIP)

short form ofsubmarine: a nuclear sub
  • sub noun [C] (FOOD)

short form ofsubmarine (sandwich)

subverb [I]

 us   /sʌb/ (-bb-)
to work as a substitute teacher: She subs at three schools.
(Definition of sub from the Cambridge Academic Content Dictionary © Cambridge University Press)

"sub" in Business English

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subnoun [C]

uk   us   /sʌb/ informal
→  subscription : You can save up to £20 if you pay your subs by direct debit.
→  substitute noun : There is a great need both for permanent teachers and subs.
payment that your employer gives you earlier than usual because you need money: I ran out of money on Thursday and had to ask my boss for a sub.

subverb [T]

uk   us   /sʌb/ (-bb-)
to pay an employee earlier than usual because they need money: He subbed him his wages because he had to buy a plane ticket.
(Definition of sub from the Cambridge Business English Dictionary © Cambridge University Press)
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“sub” in American English

“sub” in Business English

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