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  • 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

On every room door there was a sign-up list.

From The Wall Street Journal Mar. 12, 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

Over the course of the summer, the firm organized a series of events and outings for its associates, sending around sign-up sheets for anyone who wanted to go.

From "Becoming" by Michelle Obama

To get prepared for earthquakes, sign up for The Times’ Unshaken newsletter.

From Los Angeles Times Jul. 29, 2026

If you sign up before Aug. 14 and complete at least one of the challenges, we’ll mail you some fun stuff!

From Slate Jul. 28, 2026

But any child who is under 18 and has a valid Social Security number can sign up for a Trump account.

From MarketWatch Jul. 23, 2026

He has said that the movement was started as a joke, but after offering the option to sign up to the movement through a Google form, he received tens of thousands of responses.

From BBC Jul. 20, 2026

“Caterpillar,” said Chicken, “Lily told me about the library reading program. If you sign up, you get prizes! I am going to read every book they have about sharks.”

From "Caterpillar Summer" by Gillian McDunn

Moonshot AI posted on X over the weekend that exploding demand for Kimi K3 had pushed capacity to its limits, leading the company to temporarily pause new sign-ups to prioritize compute access for current members.

From MarketWatch Jul. 20, 2026

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

Ad-supported plans now represent almost 50% of all premium subscription video-on-demand sign-ups in the U.S., up from 39% just two years ago, according to research firm Antenna.

From The Wall Street Journal May 12, 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

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

From "Crash" by Jerry Spinelli

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