Antonyms of VALID

Examples of usage:

  1. But we are altogether too ill acquainted with the details of his personal life, and with the motives which contributed to determine its course, to be able to arrive at any valid conclusions as to the way in which his principles affected his conduct. "Chaucer" by Adolphus William Ward
  2. Furthermore they will have so few visions, that any will awe them; so naturally they will accept any vision as valid. "This Simian World" by Clarence Day Jr.
  3. It got together to try people for the breach of law; and that incidentally brought up the validity of the old law, and then decided whether old law was valid or not. "Popular Law-making" by Frederic Jesup Stimson
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