IPA: /əˈkɜːr/
KK: /əˈkɜr/
To happen or take place; to be found or appear in a certain place or situation.
The meeting will occur next week.
Past: occurred
Past Participle: occurred
Occur is formed from "ob-" (meaning against or in the way) and "currere" (meaning to run). The word describes something that runs against or comes into the way of something else, hence the meaning to happen or take place.
Think of something 'running into' ('currere') your path or happening 'against' ('ob-') your expectations — that's why occur means to happen.