QUIZ YOURSELF ON "WAS" VS. "WERE"!
Origin of sign-up
Example sentences from the Web for sign-up
For all the press surrounding the total number of signups, the fact is that each state comprises a solitary health-care market.With More Competition and Choice, Obamacare Might Not Be So Horrible|Nick Gillespie|May 12, 2014|DAILY BEAST
But raffling off gifts in exchange for website signups is, somehow, perfectly legal.
Greg Brophy, a candidate for governor in Colorado is raffling off guns in exchange for website signups.
British Dictionary definitions for sign-up
Idioms and Phrases with sign-up
Enlist in an organization; also, register or subscribe to something. For example, He signed up for four years in the navy, or Are you planning to sign up for that pottery class? [Early 1900s]