Focus on the pronunciation of sign-up
English definition of “sign-up”
› [U] an occasion when you start doing or having something or start being a member of a group, especially by signing a document: Instead of paying a sign-up fee, investors pay a fee based on the amount they invest. The card recently was charging $20 at sign-up and $3.50 a month to use.
› [C] someone who starts to do or have something, for example someone who opens a bank account: The bank has had hundreds of sign-ups for the new account.