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sign up

verb
  1. To add a name to the list of people who are participating in something. (transitive) · We signed Bob up for kitchen cleanup duty.
  2. To add one's own name to the list of people who are participating in something (including amateur, but not professional, teams). (intransitive) · Coordinate term: sign in· Terry signed up for the soccer team.
  3. To agree to purchase some good or service. (intransitive) · After much deliberation we decided to sign up for satellite TV.
  4. To enlist in the armed forces. (intransitive) · Didn't you hear? He's just signed up!
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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.