occur - v.intr. (
occurred,
occurring)
1 come into being as an event or process
at or during some time; happen.
2 exist or be encountered in some place or conditions.
3 (foll. by to; usu. foll. by that + clause) come into the mind of, esp. as an unexpected or casual thought (it
occurred to me that you were
right).
[L occurrere go to meet, present itself (as OB-, currere run)] 
