'Happen' definitions:

Definition of 'happen'

From: WordNet
verb
Come to pass; "What is happening?"; "The meeting took place off without an incidence"; "Nothing occurred that seemed important" [syn: happen, hap, go on, pass off, occur, pass, fall out, come about, take place]
verb
Happen, occur, or be the case in the course of events or by chance; "It happens that today is my birthday"; "These things befell" (Santayana) [syn: happen, befall, bechance]
verb
Chance to be or do something, without intention or causation; "I happen to have just what you need!"
verb
Come into being; become reality; "Her dream really materialized" [syn: happen, materialize, materialise] [ant: dematerialise, dematerialize]
verb
Come upon, as if by accident; meet with; "We find this idea in Plato"; "I happened upon the most wonderful bakery not very far from here"; "She chanced upon an interesting book in the bookstore the other day" [syn: find, happen, chance, bump, encounter]

Definition of 'Happen'

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]