log in

British

verb

Also: log on. to enter (an identification number, password, etc) from a remote terminal to gain access to a multiaccess system

"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

noun

Also: login. the process by which a computer user logs in

"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

Also, log on. Enter into a computer the information needed to begin a session, as in I logged in at two o'clock, or There's no record of your logging on today. These expressions refer especially to large systems shared by numerous individuals, who need to enter a username or password before executing a program. The antonyms are log off and log out, meaning “to end a computer session.” All these expressions derive from the use of log in the nautical sense of entering information about a ship in a journal called a log book. [c. 1960]

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:

The company also said it would require users to log in for access, in an effort to keep AI bots from scraping the site.

From MarketWatch ● Nov. 3, 2026

Daloy highlighted two particular risks: the exploitation of a technical vulnerability and the use of compromised credentials allowing hackers to log in to the equipment.

From Barron's ● Nov. 2, 2026

But agents’ usefulness is limited if users won’t let them log in to email accounts and e-commerce sites so they can manage their lives and buy stuff.

From The Wall Street Journal ● Oct. 23, 2026

Contact details, vehicle registrations and postcodes were stolen in the breach that appears to have accessed databases containing wi-fi log in and car parking details.

From BBC ● Sep. 2, 2026

He turned with the small log in one hand: Amarante nodded and grinned.

From "The Milagro Beanfield War" by John Nichols

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023