YourDictionary

invalid

An invalid is a sick, weak person. (noun)

An example of an invalid is a feeble old woman in a hospital who cannot walk.

Invalid means not correct or provable or not legally recognized. (adjective)

  1. An example of invalid is a theory that has been proven wrong.
  2. An example of invalid is a marriage without a proper marriage license.

YourDictionary Definitions. Copyright © 2012 by LoveToKnow Corp.

See invalid in Webster's New World College Dictionary

See invalid in American Heritage Dictionary 4

Learn more about invalid

invalid

link/cite print suggestion box