valid
- 01 B1 Intermediate
officially acceptable and able to be used because it follows the rules.
legally or officially binding or acceptable; meeting the necessary requirements for use.
Simple“You need a valid passport to travel to another country.”
In context“The ticket inspector noted that the passenger's pass was no longer valid, as it had expired three days prior to the journey.”
UsageOften used with documents like passports, tickets, or contracts.
- 02 B2 Upper Intermediate
based on sensible reasons or facts that people can agree with.
well-grounded or justifiable; based on truth or sound reasoning.
Simple“She raised some valid points during the meeting about the budget.”
In context“While the theory is controversial, the researcher provided several valid arguments supported by recent statistical data.”
UsageCommonly describes points, arguments, reasons, or concerns.
SynonymsAntonyms - 03 C1 Advanced
in logic, an argument where the conclusion must be true if the starting ideas are true.
relating to an argument whose form is such that if the premises are true, the conclusion must also be true.
Simple“The professor explained why the student's conclusion followed a valid logical path.”
In context“In formal logic, a valid argument does not necessarily have true premises, but its structure ensures the conclusion follows from them.”
Teacher's tipIn academic contexts, remind students that 'valid' refers to the structure of the logic, while 'true' refers to the facts themselves.
SynonymsAntonymsfallacious
Usage valid votes · equally valid · longer valid
“Less than 1% voted by mail, and every single Voter had to have a VALID Photo Identity Document.”
Borrowed from Middle French valide (“healthy, sound, in good order”), from Latin validus, from valeō (“to be strong, to be healthy, to be worth”) + -idus, from Proto-Indo-European *h₂welh₁- (“be strong”).
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.