1. [informal] Form a mental image of something that is not present or that is not the case
   "The designer ideated a futuristic cityscape";
   - imagine, conceive of, envisage
    
2. (psychology, psychiatry) have thoughts of or plan something, especially suicide
   "The patient had been ideating for several weeks"

Derived forms: ideating, ideates, ideated

Type of: create by mental act, create mentally