sign up
verb
Definition of sign up
intransitive verb
: to sign one's name (as to a contract) in order to obtain, do, or join something sign up for insurance sign up for classes
From the M-W Editors
First Known Use of sign up
1875
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See words that rhyme with sign up Thesaurus: All synonyms and antonyms for sign up Nglish: Translation of sign up for Spanish speakers Britannica English: Translation of sign up for Arabic speakers
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