The word valid means true and the word faulty means false.
That is not a valid Roman numeral.
Not a valid sequence for Roman numerals
This is not a valid roman numeral!
IVIIXIV is not a valid Roman numeral.
The base word in "invalid" is "valid," which means something that is acceptable or true. When you add the prefix "in-" to "valid," it changes the meaning to "not valid" or "not acceptable."
It is a valid proof of age, however, it is not accepted everywhere as valid identification. It must be renewed after each semester and they now can be purchased online.
18
For proof of age is a licence valid 3 weeks after it expires?
You have to have a valid provisional licence and your provisional licence only becomes valid on your 17th birthday.
A valid conclusion is an accurate answer which sums up the whole of the topic.
When someone calls a statement a "valid assumption" they mean that it is probably true.
True
it is English language
acceptiable
A valid number is a logically correct answer to whatever is asking. So for example, someone asks you how many apples you have, -5 is not a valid number.
it means acceptable and it works