Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • v. To undo the process of knowing, to lose knowledge of something.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Unknown.
  • transitive v. To cease to know; to lose the knowledge of.
  • transitive v. To fail of knowing; to be ignorant of.

from The Century Dictionary and Cyclopedia

  • To become ignorant of, or unacquainted with, as something already known; lose the knowledge of.
  • Not to know; to have no knowledge of or acquaintance with.

Etymologies

un- +‎ know (Wiktionary)

Examples

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