Dictionary.com
Thesaurus.com
Jump To:
  • sign-up
    sign-up
    noun
    an act or instance of signing up.
  • sign up
    sign up
    verb
    (adverb) to enlist or cause to enlist, as for military service
Synonyms

sign-up

American  
[sahyn-uhp] / ˈsaɪnˌʌp /
Or signup

noun

sign-ups plural
  1. an act or instance of signing up.


sign up British  

verb

  1. (adverb) to enlist or cause to enlist, as for military service

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

sign up Idioms  
  1. 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]


Other Word Forms

Noun Inflected Forms

Etymology

Origin of sign-up

First recorded in 1945–50; noun use of verb phrase sign up

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Detainees previously used a sign-up sheet to meet with members of Congress or just started talking to detainees they encountered during facility tours.

From Los Angeles Times Jun. 12, 2026

No one forced him to sign-up, he said, but the idea was constantly present.

From Barron's Jun. 11, 2026

Welcome to the “Hunger Games” of parenting: summer camp sign-up.

From The Wall Street Journal Mar. 15, 2026

In the case of an expat who is approaching 65, you have to pay really close attention to the sign-up deadlines.

From MarketWatch Feb. 13, 2026

"If this is just for the sign-up," Nancy said, "I can't wait to see what they do for the contest!"

From "Scream for Ice Cream: Nancy Drew and the Clue Crew, #2" by Carolyn Keene

He added it was vital to "end the unfairness of people having to pay more because they pay monthly or don't sign up to direct debit."

From BBC Jul. 12, 2026

And next week, he’ll sign up for his fall college classes.

From Los Angeles Times Jul. 10, 2026

If you’re interested in more coverage of business, money and climate, sign up for our free Climate & Energy newsletter.

From The Wall Street Journal Jul. 10, 2026

And if you aren’t, it isn’t too late to sign up!

From Slate Jul. 9, 2026

Get your parents’ permission and sign up today!

From "Beauty Queens" by Libba Bray

So far, there have been over 6 million account sign-ups, including approximately 1.4 million accounts claiming the $1,000 seed money, according to a senior Treasury Department official.

From MarketWatch Jul. 2, 2026

Her first event drew about 50 women, and the second has more than 150 sign-ups after a video went viral.

From The Wall Street Journal May 3, 2026

Not true, according to the IRS: There’s no enrollment, advance registration or third-party sign-ups that are needed, the agency said.

From MarketWatch Apr. 9, 2026

Prediction markets’ explosive growth over the last year is mostly due to sports trading, with marquee events like the Super Bowl, Winter Olympics, and March Madness driving new customer sign-ups.

From Barron's Mar. 28, 2026

In the morning the principal had announced sign-ups for football and cheerleading and other stuff.

From "Crash" by Jerry Spinelli

Vocabulary.com logo
by dictionary.com

Join 12,000,000 vocabulary learners

Start learning new words today on VocabTrainer.
You'll remember them forever.

Start training