sub
word
Definition
A sub is someone or something that takes the place of another person or thing, especially in sports, work, or school. It can also informally mean a submarine or a long sandwich called a submarine sandwich.
Usage & Nuances
Most commonly, 'sub' is a shortened informal form of 'substitute' or 'substitute player/teacher': 'bring on a sub', 'the sub teacher'. In American English, 'sub' also commonly means a long sandwich; in some contexts it can mean 'submarine'. Meaning depends strongly on context.
Example Sentences
Let's grab a sub before we catch the train.
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Our math sub was very kind today.
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The coach put in a sub after halftime.
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I ordered a tuna sub for lunch.
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We're short a player, so we need a sub for tonight's game.
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The regular teacher is sick, so a sub is covering the class.
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