Happenstance/ˈhæpənstæns/ Definition 1 of 1Pro Tip 1/3Unplanned Encounter Happenstance often refers to unexpected meetings with people. Running into my teacher at the concert was happenstance. Pro Tip 2/3No Control Happenstance emphasizes events outside of one's control or influence. Finding a $20 bill on the street was pure happenstance. Pro Tip 3/3Serendipitous Tone Happenstance can imply a fortunate and happy coincidence. Discovering her talent for painting was just happenstance.