We found 6 definitions of sign up from 3 different sources.
Verb |
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sign up - join a club, an activity, etc. with the intention to join or participate, "Sign up for yoga classes" | ||
fall in, get together, join to take one's place in a military formation or line; "Troops fall in!" | ||
enlist join the military | ||
sign up - engage by written agreement; "They signed two new pitchers for the next season" | ||
sign, contract, sign on | ||
employ, hire, engage engage or hire for work; "They hired two new secretaries in the department"; "How many people has she employed?" | ||
contract out refuse to pay a levy to a union for political use |