sign up

sign someone up (for something)

to record the agreement of someone, including oneself, to participate in something. Has anyone signed you up for the office picnic? Can you sign up Liz for the party?

See also: sign, up

sign someone up (with someone or something)

to record the agreement of someone to join someone, a group of people, or an organization. I want to sign George up with our softball team. Tom signed up his friends with the agency.

See also: sign, up

sign up (for something)

to record one's agreement to participate in something. I want to sign up for guitar lessons. We will sign up as soon as possible.

See also: sign, up

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sign (somebody) up also sign up somebody

to join or invite someone to join a group or organization Kathy signed up for the soccer team this year. The team signed him up for two years. Local officials worked to sign up students to the summer jobs program.

Usage notes: often used when someone puts their signature on an official document

See also: sign, up