amnesia Meaning, Definition & Usage

  1. noun partial or total loss of memory
    memory loss; blackout.
    • he has a total blackout for events of the evening

WordNet

Am*ne"si*a noun
Etymology
NL., fr. Gr. priv. + to remember.
Definitions
  1. (Med.) Forgetfulness; also, a defect of speech, from cerebral disease, in which the patient substitutes wrong words or names in the place of those he wishes to employ. Quian.

Webster 1913