1. the occurrence of pleasant or beneficial events by chance or accident

Examples

• Finding that rare book at the garage sale was pure serendipity.
• The discovery of penicillin was a famous example of serendipity in science.
• Meeting my future business partner on that delayed flight was serendipity.
• She attributed her successful career to hard work and a bit of serendipity.
• The serendipity of running into an old friend made her day.
• Sometimes serendipity plays a bigger role in success than planning does.