/cat⋅a⋅lyst/ – noun 1. something that causes activity between two or more persons or forces without itself being affected. 2. a person or thing that precipitates an event or change 3. a person whose talk, enthusiasm, or energy causes others to be more friendly, enthusiastic, or energetic. 4. my "A" list (get it? my name is Kat and here is my "A" list...Kat A List??) Shit I randomly think about and figured I'd share with the world.