The definition of conceptualize is to form an idea.(verb)
An example of conceptualize is for an author to envision the plot for her next novel.
See conceptualize in Webster's New World College Dictionary
See conceptualize in American Heritage Dictionary 4
verb con·cep·tu·al·ized, con·cep·tu·al·iz·ing, con·cep·tu·al·iz·es verb, transitive
Learn more about conceptualize