DictionaryvalidOfficially acceptable
adjective

valid

VAL-id/ˈvælɪd/

Acceptable as sound under the relevant rules or evidence.

The attendant lets her through the gate with a valid ticket.

A traveler presents an intact plain ticket that fits the gate scanner slot; the attendant welcomes her through the open gate with a clear approving gesture; no letters or numbers.
Etymology

Latin validus describes strength or effectiveness. In English, this became legal force first, then the strength of an argument or claim sufficiently supported by facts or authority.

In context

The Scottish Parliament51:18
a legal action is both valid and able to hold legal weight—not a law that has had to be overturned or rendered obsolete.
Scottish Conservative and Unionist Party Debate: Repealing the Hate Crime Act - 17 April 2024

More examples

  • Your license remains valid until the end of the year.
  • She raises a valid concern about the cost.
  • The conclusion is valid because the evidence supports it.

Forms

valid

validity noun — The quality of being sound or acceptable.

validate verb — Confirm that something meets required standards.

Similar words

legitimate
Emphasizes conformity to law or recognized authority, not reasoning.
sound
Emphasizes solid reasoning or evidence rather than official acceptance.