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invalid2

in·val·id2

invalid2

pronunciation:
In vae lihd
part of speech: adjective
definition 1: without legal or factual force or effect; not valid; void.
His claim was rendered invalid by the court.
antonyms:
effective, effectual, valid
similar words:
void
definition 2: without rational basis; incorrect; false.
the invalid premise of his argument
antonyms:
valid
similar words:
illogical, irrational
derivations: invalidly (adv.), invalidity (n.), invalidness (n.)