Convolution; from the mathematical definition is a relationship or expression involving a  quantity that may change within the context of a problem or experiment, which is derived from other two given relationships by integration that expresses, how the shape of one is modified by the other. In other words let’s say you have two sets of ingredients, one is bananas and the other is milk, then you blend them and you have a banana shake. That is convolution; the math is in the blending result, but you don’t need to be aware of it…

via Convolution A Memoir With A Future