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sign-up

or signup

[sahyn-uhp] /ˈsaɪnˌʌp/
noun
1.
an act or instance of signing up.
Origin of sign-up
1945-1950
1945-50; noun use of verb phrase sign up
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Word Origin and History for signup

sign-up

n.

"number who have signed up," 1926, from the verbal phrase; see sign (v.) + up (adv.).

Online Etymology Dictionary, © 2010 Douglas Harper
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