| Definitions | | sub |
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noun
- a submarine
- a sandwich made on a long bun; submarine sandwich
- We can get subs at that deli.
- (US, informal) A substitute.
- With the score 4 to 1, they brought in subs.
- She worked as a until she got her teaching certificate.
verb (sub, b, ing)
- (US, informal) To substitute for.
- (US, informal) To work as a substitute teacher, especially in primary and secondary education.
Etymology: Shortened form of submarine.
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Full Definition of sub
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