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from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The process of identifying oneself to a computer, usually by entering one's username and password.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A combination of a user's identification and password used to enter a computer, program, network, etc.
  • n. The process of logging in.


From the verb log in. (Wiktionary)



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