valid
Tags: TOEFL core, academic
adjective
producing a desired result based on truths or facts; convincing
- You must show a valid student ID card to receive the discount at the museum.
- The scientist's conclusion was based on several experiments, making it a valid hypothesis.
noun validity
The state of being legally or officially binding or acceptable, or the quality of being logically or factually sound.
- The validity of your passport expires next month, so you must renew it before your trip.
- The team is running extra tests to check the validity of the survey results before publishing them.
adverb Validly
In a way that is legally or officially acceptable; in a logically sound manner.
- She could not validly sign the contract because she was under the age of eighteen.
- The witness had not seen the event, so his testimony could not be validly used as evidence.