val ‧ id AC /ˈvæləd, ˈvælɪd/ BrE AmE adjective
[ Word Family: verb : ↑ validate ≠ ↑ invalidate ; noun : ↑ validity ≠ ↑ invalidity ; adjective : ↑ valid ≠ ↑ invalid ]
[ Date: 1500-1600 ; Language: French ; Origin: valide , from Latin validus 'strong, effective' , from valere ; ⇨ VALOR ]
1 . a valid ticket, document, or agreement is legally or officially acceptable OPP invalid :
a valid credit card
Your return ticket is valid for three months.
2 . valid reason/argument/criticism etc a reason, argument etc that is based on what is reasonable or sensible:
Police officers must have a valid reason for stopping motorists.
3 . a valid ↑ password , ↑ ID etc is one that will be accepted by a computer system OPP invalid
—validity /vəˈlɪdəti, vəˈlɪdɪti/ noun [uncountable] :
I would question the validity of that statement.
• • •
COLLOCATIONS (for Meaning 2)
■ nouns
▪ point
I think that's a valid point.
▪ reason
I had a perfectly valid reason for being there.
▪ argument
None of these arguments are valid.
▪ criticism
If the criticism is valid, you should make the appropriate changes.
▪ excuse
You must have a valid excuse for any absence.
■ adverbs
▪ equally valid
Each of these ways of looking at things is equally valid.
▪ perfectly valid
It's a perfectly valid question.
▪ statistically/scientifically valid (=based on correct numbers or good research)
The drug trials were scientifically valid.