Definitions

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

  • n. A sound in one ear or both ears, such as buzzing, ringing, or whistling, occurring without an external stimulus and usually caused by a specific condition, such as an ear infection, the use of certain drugs, a blocked auditory tube or canal, or a head injury.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The perception of noise, such as a ringing or beating sound, which has no external source.

from the GNU version of the Collaborative International Dictionary of English

  • n. A ringing, whistling, or other imaginary noise perceived in the ears; -- called also tinnitus aurium.

from The Century Dictionary and Cyclopedia

  • n. In medicine, a ringing in the ears.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a ringing or booming sensation in one or both ears; a symptom of an ear infection or Meniere's disease

Etymologies

Latin tinnītus, from past participle of tinnīre, to ring, of imitative origin.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin tinnītus ("a jingling, ringing"). (Wiktionary)

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