Meaning : Come to pass.
Example :
What is happening?.
The meeting took place off without an incidence.
Nothing occurred that seemed important.
Synonyms : come about, fall out, go on, hap, happen, pass, pass off, take place
Meaning : Come to one's mind. Suggest itself.
Example :
It occurred to me that we should hire another secretary.
A great idea then came to her.
Synonyms : come
Meaning : To be found to exist.
Example :
Sexism occurs in many workplaces.
Precious stones occur in a large area in Brazil.