WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
an improvement that makes something more agreeable
noun.
the act of adding a sweetener to food
noun.
something added to foods to make them taste sweeter
Word Usage
"You are the (well known) secret to my success in sweetening the busy lives of my fellow grad students, thank you for all your hard work and for being an inspiration to my baking!"