definition of
happen

[1] #1 happen v. [hap, go on, pass off, occur, pass, fall out, come about, take place] come to pass; "What is happening?"; "The meeting took place off without an incidence"; "Nothing occurred that seemed important". wn

[2] #2 happen v. [befall, bechance] 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). wn

[3] #3 happen v. chance to be or do something, without intention or causation; "I happen to have just what you need!". wn

[4] #4 happen v. [materialize, materialise] come into being; become reality; "Her dream really materialized". wn

[5] #5 happen v. [find, chance, bump, encounter] 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". wn