A chance circumstance: "Marriage loomed only as an outgrowth of happenstance; you met a person” ( Bruce Weber). (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "happenstance" in a sentence
"I won’t tell you the main happenstance, because that twist IS the plot … but …. you’ll recognize it too."
"The saying " If....were better I would be okay" has come to sum up a dependence on "happenstance" to bring me or others a sense of well being, okay-ness, safety or joy."
"The impression on an anti-Semite or potential anti-Semite is that the 'happenstance' of his vet status saves him from being rightfully obliterated."