— validly , adv. — validness , n.
/val"id/ , adj.
1. sound; just; well-founded: a valid reason.
2. producing the desired result; effective: a valid antidote for gloom.
3. having force, weight, or cogency; authoritative.
4. legally sound, effective, or binding; having legal force: a valid contract.
5. Logic. (of an argument) so constructed that if the premises are jointly asserted, the conclusion cannot be denied without contradiction.
6. Archaic. robust; well; healthy.
[ 1565-75; validus strong, equiv. to val ( ere ) to be strong + -idus -ID 4 ]
Syn. 3. substantial, cogent. 5. logical, convincing.