sign%20up

verb

1. 1

   To add a name to the list of people who are participating in something.

   “We signed up Bob for kitchen cleanup duty.”

2. 2

   To add one's own name to the list of people who are participating in something (including amateur, but not professional, teams)

   “Terry signed up for the soccer team.”

3. 3

   To agree to purchase some good or service.

   “After much deliberation we decided to sign up for satellite TV.”