mental confusion men·tal·con·fusion uncommon noun 1. a mental state characterized by a lack of clear and orderly thought and behavior “a confusion of impressions” Synonymsconfusionmental confusionconfusednessdisarray Related words Word family confuse Broader terms cognitive state Narrower terms disorientationdistractiondazehalf-cockjamais vubewildermentperplexity WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.