sign-in
noun
an act, an instance, or a time of signing in.
sign-in
American
[sahyn-in]
/ ˈsaɪnˌɪn /
noun
sign in
British
verb
-
to sign or cause to sign a register, as at a hotel, club, etc
-
to make or become a member, as of a club
sign in
Idioms
Etymology
Origin of sign-in
First recorded in 1945–50; noun use of verb phrase sign in
Compare meaning
How does sign-in compare to similar and commonly confused words? Explore the most common comparisons:
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:
We shouldn’t have to sign-in every time we fire up the laptop and other devices.
From The Wall Street Journal ● Apr. 15, 2026
It provides a single sign-in portal that verifies and grants appropriate access to various programs.
From Barron's ● Feb. 5, 2026
The email, which looked to him like a fraud alert, directed him to what was ostensibly his bank’s sign-in page.
From Los Angeles Times ● Jan. 12, 2024
Preserving content on Google Photos requires a specific sign-in.
From Seattle Times ● Nov. 27, 2023
“Every time I go to die Behavioral Center, I look over the list on the sign-in book, and I never see Tina’s name. Do you think she’s ever gone there to see Branwell?”
From "Silent To The Bone" by E.L. Konigsburg
They also found that while high white blood cell counts are usually a warning sign, in serious infection a low count can signal the immune system is becoming overwhelmed.
From BBC ● Jun. 16, 2026
This week, she took down the Platner sign in their yard.
From The Wall Street Journal ● Jun. 6, 2026
More than once, I arrived home from school to find an unexpected “for sale” sign in our yard.
From The Wall Street Journal ● May 26, 2026
“Open as usual but dressed for filming” read a sign in the window of the Stripey Badger Bookshop, Coffee Shop and Kitchen.
From Los Angeles Times ● May 14, 2026
Daddy turns on the lights but keeps the closed sign in the window.
From "The Hate U Give" by Angie Thomas
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
