1. (n.) The quality or state of being valid; strength; force; especially, power to convince; justness; soundness; as, the validity of an argument or proof; the validity of an objection.

2. (n.) Legal strength, force, or authority; that quality of a thing which renders it supportable in law, or equity; as, the validity of a will; the validity of a contract, claim, or title.

3. (n.) Value.

actionability admissibility admissibleness advantageousness agreeableness allowableness amperage applicability armipotence auspiciousness authenticity authoritativeness authority beef beneficialness benevolence benignity black power brute force calculability charge charisma class clout cogence cogency compulsion constitutional validity constitutionalism constitutionality dependability desert dint drive due process duress effect effectiveness effectuality efficacy energy excellence expedience fairness faithworthiness favorableness fineness firmness first-rateness flower power force force majeure forcefulness full blast full force goodliness goodness grace gravity healthiness helpfulness influence invincibility jurisdiction justice justiciability justifiableness justness kindness lawfulness legal form legal process legalism legality legitimacy legitimateness licitness main force main strength mana merit might might and main mightiness moxie muscle power niceness permissibility permissibleness pizzazz pleasantness poop potence potency potentiality power power pack power structure power struggle powerfulness predictability prepotency productiveness productivity profitableness puissance pull punch push quality reliability rewardingness rightfulness sanctionableness scope secureness security sinew skillfulness solidity soundness stability staunchness steadfastness steadiness steam strength strong arm substantiality superiority superpower trustworthiness unerringness usefulness value vehemence vigor vim virility virtue virtuousness virulence vitality warrantableness wattage weight wholeness worth