definition of
occur

[1] #1 occur v. [happen, hap, go on, pass off, 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 occur v. [come] come to one's mind; suggest itself; "It occurred to me that we should hire another secretary"; "A great idea then came to her". wn

[3] #3 occur v. to be found to exist; "sexism occurs in many workplaces"; "precious stones occur in a large area in Brazil". wn