English English Wikipedia has an article on:Diminishing returnsWikipedia Noun law of diminishing returns The tendency for a continuing effort toward a particular goal to decline in effectiveness after a certain amount of success has been achieved. (economics) A relationship between input and output, such that adding units of any one input (labour, capital etc.) to fixed amounts of the others will yield successively smaller increments of output.Wikiwand - on Seamless Wikipedia browsing. On steroids.