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valid Meaning, Definition & Usage

  1. adjective well grounded in logic or truth or having legal force
    • a valid inference
    • a valid argument
    • a valid contract
  2. adjective satellite still legally acceptable
    • the license is still valid
WordNet

Val"id adjective
Etymology
F. valide, F. validus strong, from valere to be strong. See Valiant.
Definitions
  1. Strong; powerful; efficient. Obs. "Perhaps more valid arms . . . may serve to better us." Milton.
  2. Having sufficient strength or force; founded in truth; capable of being justified, defended, or supported; not weak or defective; sound; good; efficacious; as, a valid argument; a valid objection.
    An answer that is open to no valid exception. I. Taylor.
  3. (Law) Having legal strength or force; executed with the proper formalities; incapable of being rightfully overthrown or set aside; as, a valid deed; a valid covenant; a valid instrument of any kind; a valid claim or title; a valid marriage. Syn. -- Prevalent; available; efficacious; just; good; weighty; sufficient; sound; well-grounded.

Webster 1913