to sign a form or contract which says that you agree to do a job or become a soldier; to persuade sb to sign a form or contract like this; to put your name down to join or take part in an activity, event, club, or organization; to arrange to do a course of study by adding your name to the list of people doing it; to say you never agreed to an unpleasant or unexpected situation, usually in “I didn’t sign up for this”
Oxford47% of films
to sign a form or contract which says that you agree to do a job or become a soldier; to persuade sb to sign a form or contract like this
Editorial27% of films
to put your name down to join or take part in an activity, event, club, or organization
Looking to sign up.
Oxford20% of films
to arrange to do a course of study by adding your name to the list of people doing it
Editorial7% of films
to say you never agreed to an unpleasant or unexpected situation, usually in “I didn’t sign up for this”
I didn't sign up for this.
Definitions from the Oxford Advanced Learner's Dictionary, 9th edition