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1. Well grounded; just: a valid objection.
2. Producing the desired results; efficacious: valid methods.
3. Having legal force; effective or binding: a valid title.
4. Logic
a. Containing premises from which the conclusion may logically be derived: a valid argument.
b. Correctly inferred or deduced from a premise: a valid conclusion.
5. Archaic Of sound health; robust.

[French valide, from Old French, from Latin validus, strong, from valēre, to be strong; see wal- in Indo-European roots.]

va·lid′i·ty, val′id·ness n.
val′id·ly adv.
Synonyms: valid, sound2, cogent, convincing
These adjectives describe assertions, arguments, conclusions, reasons, or intellectual processes that are persuasive because they are well founded. What is valid is based on or borne out by truth or fact or has legal force: a valid excuse; a valid claim.
What is sound is free from logical flaws or is based on valid reasoning: a sound theory; sound principles.
Something cogent is both sound and compelling: cogent testimony; a cogent explanation.
Convincing implies the power to dispel doubt or overcome resistance or opposition: convincing proof.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adv.1.validly - with validity; in a valid manner; "this may not validly be done"
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(ˈvӕlid) adjective
1. (of reasons, arguments etc) true; reasonable or acceptable. That is not a valid excuse.
2. legally effective; having legal force. He has a valid passport.
ˈvalidly adverb
References in classic literature ?
The only reason that could be validly alleged against mnemic causation would be that, in fact, all the phenomena can be explained without it.
Further, as of the expiry date of the repurchase offer on 21 November 2017, the fund's depositary agent Computershare Trust Company NA indicated that 4,639,800 shares or about 71% of its outstanding Shares as of the same date, were validly submitted for tender and not withdrawn.
AT&T has accepted for purchase $3,285,117,000 aggregate principal amount of Maximum Tender Offer Notes validly tendered and not validly withdrawn pursuant to the Maximum Tender Offers.
the Depositary for the offers, $481,205,000 in aggregate principal amount of notes subject to the Maximum Tender Offer were validly tendered and not validly withdrawn before 5:00 p.
2m principal amount of the notes were validly tendered and not validly withdrawn in the offer, including approximately USD0.
AvalonBay" or the "Company") (NYSE:AVB) announced today that it accepted for purchase the principal amount of its outstanding notes set forth below, which were validly tendered pursuant to its previously announced cash tender offer for such notes (the "Tender Offer").
56 for each USD1,000 in principal amount of notes validly tendered, and not validly withdrawn, and accepted for purchase pursuant to the tender offer, plus accrued interest.
Terra Capital announced that consents had been delivered in respect of the following principal amounts of Notes, which Notes had been validly tendered and not withdrawn as of 5:00 p.
500% notes due 2040 (representing 100% of such existing notes validly tendered and not validly withdrawn); USD234.