Words at Play : Simple But Intelligent Word Choices, Vol. 2
Definition:
luck that takes the form of finding valuable or pleasant things that are not looked for
Words It Might Replace:
luck; chance; good fortune
Example:
"If there is one thing social networks and living in public have facilitated, it's serendipity. Serendipity is a good thing. It's been well documented that people who talk to strangers tend to be luckier, and this also applies to communicating with our existing networks..." Kaila Colbin, MediaPost.com, July 15, 2011