I. abbreviation
1. official receiver
2. on request
3. operating room
4. operations room
5. ordered recorded
6. other ranks
7. owner's risk
II. ˈȯ(ə)r, ˈȯ(ə) noun
( -s )
Etymology: or (I)
: a logical operator equivalent to the sentential connective or
OR gate in a computer
III. abbreviation
1. operational research; operations research
2. own recognizance