Sentence:  I mean something more like Freud 's <WSD>concept</WSD> of the utility of `` play '' to a small child : he plays `` house '' or `` doctor '' or `` fireman '' as a way of mastering slightly frightening experiences , reliving them imaginatively until they are under control . 
Meaning of the word marked with <WSD> tags:  an abstract or general idea inferred or derived from specific instances