verb.
Simple past tense and past participle of overheat.
adjective.
Excessively heated
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
heated beyond a safe or desirable point
Word Usage
"But this argument, too, turns out to be a matter of definition: "The term overheated economy, as we shall use it, refers to a situation in which confidence has gone beyond normal bounds ....""