Invalidate (Verb)
Meaning 1
Make invalid for use; "cancel cheques or tickets".
Classification
Verbs of telling, asking, ordering, singing.
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Meaning 2
Declare invalid; "The contract was annulled"; "void a plea".
Classification
Verbs of political and social activities and events.
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Meaning 3
Show to be invalid.
Classification
Verbs of thinking, judging, analyzing, doubting.