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

  • n. A wound or injury.
  • n. A localized pathological change in a bodily organ or tissue.
  • n. An infected or diseased patch of skin.
  • transitive v. To cause a lesion to form on or in.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A wound or injury.
  • n. An infected or otherwise injured or diseased organ or part, especially such patch of skin.
  • v. To wound or injure, especially in an experiment or other controlled procedure.

from the GNU version of the Collaborative International Dictionary of English

  • n. Loss sustained from failure to fulfill a bargain or contract.
  • n. Any morbid change in the exercise of functions or the texture of organs.

from The Century Dictionary and Cyclopedia

  • n. A hurting; hurt; wound; injury.
  • n. In civil law, the loss or injury suffered in a commutative contract by the party who does not receive an equivalent for what he gives.
  • n. In pathology, any morbid change in the structure of organs.

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

  • n. an injury to living tissue (especially an injury involving a cut or break in the skin)
  • n. any localized abnormal structural change in a bodily part


Middle English lesioun, from Old French lesion, from Latin laesiō, laesiōn-, from laesus, past participle of laedere, to injure.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English, from Middle French, from Latin laesiō ("injury"), itself from laesus, perfect passive participle of laedō ("I injure, hurt"). (Wiktionary)



Log in or sign up to get involved in the conversation. It's quick and easy.