invalid
Not accepted as correct or official, usually because it breaks a rule.
invalid in a sentence
- The ticket was invalid because it had run out last week.
- The goal was invalid because the ball had gone out of play.
Try an 11+ style question
Verbal reasoning papers often ask about a word like this.
Which word is closest in meaning to invalid?
- Aacceptable
- Bvoid
- Cvalid
Show the answer
B: void. The other three mean the opposite of invalid.
Which word is most nearly opposite in meaning to invalid?
- Avoid
- Bvalid
- Cincorrect
Show the answer
B: valid. The other three mean nearly the same as invalid.
Words that mean something similar
void, incorrect
Words that mean the opposite
valid, acceptable
More words about thinking & learning
- jinx: Something believed to bring bad luck.
- judicious: Showing good sense and careful judgement.
- justify: To give a good reason for something you have done.
- knack: A clever skill for doing something easily.
- knowledgeable: Knowing a lot about something.
- logical: Sensible, and following clear reasoning.
- lucid: Very clear and easy to understand, or thinking clearly.
- ludicrous: So silly that it makes you laugh.
More words to explore
Sitting the 11+ in Kent, Medway or Buckinghamshire?
Plain-English guides to each test, from the councils’ own pages: Kent Test · Medway Test · Bucks Secondary Transfer Test