Definition of overactive
- overactive glands
- an overactive imagination
She has an overactive bladder.
His crazy ideas are products of an overactive imagination.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'overactive.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: too active especially in a way that produces a bad result
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