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

Other Word Forms

• validly adverb
• validness noun
• nonvalid adjective
• nonvalidly adverb
• nonvalidness noun
• prevalid adjective
• prevalidly adverb
• quasi-valid adjective
• quasi-validly adverb
• validity noun

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

“You can be Team Jeremiah and be friends with somebody who’s Team Conrad and vice versa, it’s all valid,” she says.

From Los Angeles Times

The Met Office warning covers all of Wales and most of England - away from the far north - and is valid until 1800 on Monday.

From BBC

A Met Office Yellow wind warning has been issued across most of England and all of Wales and is valid from 8pm Sunday until 6pm Monday.

From BBC

The takeover of the local police department was valid for 30 days which expired earlier this week.

From BBC

All of those who quit had valid work permits issued by California, he said, but were worried after hearing people with California paperwork were getting harassed in Oklahoma, Texas and Florida.

From Los Angeles Times

Related Words

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