Verb

(en verb)

To occur or take place.

*{{quote-magazine, date=2013-06-28, author=(Joris Luyendijk)

, volume=189, issue=3, page=21, magazine=(The Guardian Weekly) , title= Our banks are out of control , passage=Seeing the British establishment struggle with the financial sector is like watching an alcoholic who still resists the idea that something drastic needs to happen for him to turn his life around.}}

To occur unexpectedly, by chance or with a low probability.

To encounter by chance.

* 1860 , , The Marble Faun , ch. 30:

Unexpectedly, in a nook close by the farmhouse, he happened upon a spot where the vintage had actually commenced.