valid

[ val-id ]

adjective

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.

   Synonyms: cogent, substantial

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.

   Synonyms: convincing, logical

6. Archaic. robust; well; healthy.

valid

/ ˈvælɪd; vəˈlɪdɪtɪ /

adjective

1. having some foundation; based on truth
2. legally acceptable

   a valid licence

3. 1. having legal force; effective
   2. having legal authority; binding
4. having some force or cogency

   a valid point in a debate

5. logic (of an inference or argument) having premises and conclusion so related that whenever the former are true the latter must also be true, esp ( formally valid ) when the inference is justified by the form of the premises and conclusion alone. Thus Tom is a bachelor; therefore Tom is unmarried is valid but not formally so, while today is hot and dry; therefore today is hot is formally valid Compare invalid 2
6. archaic.
   healthy or strong

Derived Forms

• validity, noun
• ˈvalidly, adverb

Other Words From

• valid·ly adverb
• valid·ness noun
• non·valid adjective
• non·valid·ly adverb
• non·valid·ness noun
• pre·valid adjective
• pre·valid·ly adverb
• quasi-valid adjective
• quasi-valid·ly adverb

Word History and Origins

Origin of valid¹

First recorded in 1565–75; from Latin validus “strong,” from val(ēre) “to be strong” + -idus -id ⁴; prevail ( def )

Word History and Origins

Origin of valid¹

C16: from Latin validus robust, from valēre to be strong

Example Sentences

With each move, he randomly chose from among the set of valid moves.

From FiveThirtyEight

Of course, the state still needs to verify that all those signatures are valid, but 410,087 of the 485,650 that the state has checked so far are indeed valid.

From FiveThirtyEight

With each move, he randomly chooses one among the set of valid moves.

From FiveThirtyEight

If instead you prefer to keep orienting yourself around your marriage — again, each approach can be valid — then learn to communicate both what you intend and what you hope will come of that.

From Washington Post

To them, I say what you’re feeling is valid and we’re here to support you.

From Washington Post

Meanwhile, Marino promises “radical changes” and vows to check every contract the city has—to see if they are valid.

From The Daily Beast

Saying climate change is a matter of belief perpetuates the dangerous misconception that there are multiple valid opinions.

From The Daily Beast

And that would be a valid, if pointless, thing for me to do.

From The Daily Beast

They also wondered why this second dunk would be more valid, without three rabbis present.

From The Daily Beast

Literary pedigree is or should be a valid concern for any writer or for any critic considering that writer.

From The Daily Beast

Such a license though defective is valid until revoked by the proper authority.

From Project Gutenberg

In short, insurgency ceased to be a valid plea; if it existed in fact, officially it had become a dead letter.

From Project Gutenberg

Such policies are not valid until countersigned, unless the countersigning is waived.

From Project Gutenberg

A valid payment may also be made in other means than money; a check or note may be given for it.

From Project Gutenberg

An assignment to one who has an insurable interest as relative, creditor and the like, is always valid.

From Project Gutenberg

Related Words

• accurate
• authentic
• binding
• compelling
• conclusive
• credible
• good
• lawful
• legal
• legitimate
• logical
• original
• persuasive
• solid
• true
• well-founded