Sentence:  As a preliminary formulation we might say: <WSD>Intentionality</WSD> is that property of many mental states and events by which they are directed at or about or of objects and states of affairs in the world. 
Meaning of the word marked with <WSD> tags:  the characteristic of a mental state whereby it is "about" something, which relates to mental states in an analogous way as meaning relates to a word