From Longman Dictionary of Contemporary Englishoveractiveo‧ver‧ac‧tive /ˌəʊvərˈæktɪv◂ $ ˌoʊv-/ adjective TOO/TOO MUCHtoo active, in a way that produces a bad result OPP underactive an overactive thyroid gland Such fears are nothing more than the product of an overactive imagination.
Examples from the Corpus
overactive• She was very overactive and had not slept for three nights.• When a surgeon destroys overactive cells in the globus pallidum, he restores balance to the system, said Grossman.• The mussels were so enormous I suspected they had some kind of overactive glandular condition.• But is there any real evidence that such zodiacs are anything more than the product of an overactive imagination?• The reverse happens in animals that need to reduce heat due to an overactive metabolism.• They may be sleepless from an overactive mind and sensitivity to slight noises which disturb them.• Other medical conditions, such as an overactive thyroid gland, occasionally cause similar symptoms.overactive imagination• But is there any real evidence that such zodiacs are anything more than the product of an overactive imagination?• Are they products of an overactive imagination, or the just aftermath of a plate full of funny mushrooms? 