Definition of "sign up" []

To add a name to the list of people who are participating in something. (verb)
To add one's own name to the list of people who are participating in something. (verb)
To agree to purchase some good or service. (verb)

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Use "sign up" in a sentence

"When I moved to Los Angeles, in my twenties, the first thing I did was sign up for Jane Fondas aerobics classes."
"When I began reclaiming my life, one of the first things I did was sign up for Pilates classes, a delicious yoga-like exercise regime that helped strengthen my body and relax my mind."
"Institute for Women and Technology: To learn about this nonprofit organization, inquire about seminars, or sign up on the Systers List, go to www.iwt.org, or call 650-812-4496."

Words like "sign up"

hire contract engage

employ join sign

sign on fall in get together