valid

Well grounded; just.

Producing the desired results; efficacious.

Having legal force; effective or binding.

Containing premises from which the conclusion may logically be derived.

Correctly inferred or deduced from a premise.

Of sound health; robust.

Strong: powerful; efficient.

Sufficiently supported by fact; well-grounded; sound; just; good: capable of being justified or defended; not weak or defective: as, a valid reason; a valid objection.

Good or sufficient in point of law; efficacious; executed with the proper formalities; incapable of being rightfully overthrown or set aside; sustainable and effective in law, as distinguished from that which exists or took place in fact or appearance, but has not the requisites to entitle it to be. recognized and enforced by law: as, a, valid deed; a valid covenant; a valid instrument of any kind; a valid claim or title; a valid marriage; a valid ordination.—4. In zoology and hot., having sufficient classificatory strength or force; scientifically founded or well-grounded; securely established: as, a valid family, genus, or species; & valid classification.