How do you spell Occur

Available Definitions:
1)  v. i. - To meet; to clash.
2)  v. i. - To go in order to meet; to make reply.
3)  v. i. - To meet one's eye; to be found or met with; to present itself; to offer; to appear; to happen; to take place; as, I will write if opportunity occurs.
4)  v. i. - To meet or come to the mind; to suggest itself; to be presented to the imagination or memory.