valid
US /ˈvæl.ɪd/
UK /ˈvæl.ɪd/
1.
having a sound basis in logic or fact; reasonable or cogent
:
•
The argument he presented was logically valid.
•
Her reasons for leaving were perfectly valid.
2.
(of a ticket, document, or agreement) legally or officially acceptable
:
•
Your passport is only valid for six more months.
•
This coupon is valid until the end of the month.