| OU | the outside boundary or surface of something |
|---|---|
| OU | the part of the ear visible externally |
| OU | a garment worn over other garments |
| OU | a 130-mile long archipelago northwest of Scotland |
| OU | a landlocked socialist republic in central Asia |
| OU | any location outside the Earth's atmosphere |
| OU | mutual sexual gratification without the exchange of bodily fluids |
| OU | situated at the farthest possible point from a center |
| OU | clothing for use outdoors |
| OU | overcome or cause to waver or submit by (or as if by) staring |
| OU | the outlet of a river or drain or other source of water |
| OU | the area of a baseball playing field beyond the lines connecting the bases |