sign up

Definitions of sign up
  1. verb
    engage by written agreement
    synonyms: contract, sign, sign on
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    contract out
    assign a job to someone outside one's own business
    type of:
    employ, engage, hire
    engage or hire for work
  2. verb
    join a club, an activity, etc. with the intention to join or participate, "Sign up for yoga classes"
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    join the military
    enroll into service compulsorily
    type of:
    fall in, get together, join
    become part of; become a member of a group or organization
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