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[noun lawg-in, log-; verb lawg-in, log-] /noun ˈlɔgˌɪn, ˈlɒg-; verb ˌlɔgˈɪn, ˌlɒg-/ Digital Technology
noun, Also, log-in, logon
the act of logging in to a database, mobile device, or computer, especially a multiuser computer or a remote or networked computer system.
a username and password that allows a person to log in to a computer system, network, mobile device, or user account.
verb (used without object)
to log in: Login with your new password. See log1 (def 17).
Usage note
Many who are neither professionals in the computer field nor amateur tech enthusiasts condemn the use of the solid form login as a verb, and with reason. It doesn’t behave like a normal verb. You cannot say you have loginned, and you are never in the process of loginning. Moreover, you cannot even ask someone to login you; you must ask that person to log you in. Clearly, it is the two-word phrase log in that functions fully as an English verb and not the solid form. Normally, we would expect log in, the verb phrase and login, the noun to behave in the same way as similar pairs: blow out/blowout, crack down/crackdown, hang up/hangup, splash down/splashdown, turn off/turnoff, where the two-word phrase is a verb and the one-word form a noun.
And yet, this gluing together of terms like login, logon, backup, and setup as verbs is common, especially in writing about computers. Not for everyone, however. Some well-known software companies, for example, carefully maintain the distinction in their programs and documentation.
But habits are difficult to change. Those who react to the one-word verb as an error will probably have to get used to it, and those who use the one-word verb will have to recognize that others will see it and wince. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for login
Contemporary Examples
Historical Examples
  • "Your login and password," she said, looking a little surprised.

    Little Brother

    Cory Doctorow
  • I'd like you to tell me your login and password for your Pirate Party email, please?

    Little Brother

    Cory Doctorow
  • I saw Severe Haircut Woman's face, saw her smirk as she asked me for my login.

    Little Brother

    Cory Doctorow
Contemporary definitions for login

the ability to access a computer or computer service

Word Origin

1965-70's 21st Century Lexicon
Copyright © 2003-2014, LLC
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Word Origin and History for login

in the computer sense, as one word, by 1983, from log in.

Online Etymology Dictionary, © 2010 Douglas Harper
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