'To happen on' definitions:

Definition of 'To happen on'

From: GCIDE
  • Happen \Hap"pen\ (h[a^]p"p'n), v. i. [imp. & p. p. Happened (-p'nd); p. pr. & vb. n. Happening.] [OE. happenen, hapnen. See Hap to happen.]
  • 1. To come by chance; to come without previous expectation; to fall out. [1913 Webster]
  • There shall no evil happen to the just. --Prov. xii. 21. [1913 Webster]
  • 2. To take place; to occur. [1913 Webster]
  • All these things which had happened. --Luke xxiv. 14. [1913 Webster]
  • To happen on, to meet with; to fall or light upon. "I have happened on some other accounts." --Graunt.
  • To happen in, to make a casual call. [Colloq.] [1913 Webster]