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

  • n. The condition of being sick; illness.
  • n. A disease; a malady.
  • n. Nausea.
  • n. A defective or unsound condition.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The quality or state of being sick or diseased; illness; disease or malady.
  • n. Nausea; qualmishness; as, sickness of stomach.

from the GNU version of the Collaborative International Dictionary of English

  • n. The quality or state of being sick or diseased; illness; sisease or malady.
  • n. Nausea; qualmishness.

from The Century Dictionary and Cyclopedia

  • n. The state of being sick or suffering from disease; a diseased condition of the system; illness; ill health.
  • n. A disease; a malady; a particular kind of disorder.
  • n. A derangement or disturbance of the stomach, manifesting itself in nausea, retching, and vomiting: distinctively called sickness of the stomach.
  • n. A disordered, distracted, or enfeebled state of anything.
  • n. Synonyms and Ailment, etc. See illness and sick.
  • n. Disorder, distemper, complaint.

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

  • n. defectiveness or unsoundness
  • n. the state that precedes vomiting
  • n. impairment of normal physiological function affecting part or all of an organism


From Old English seocness. (Wiktionary)


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