| 1. | a bridge or other structure for crossing over a river, highway, etc. |
| 2. | Genetics.
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| 3. | Popular Music.
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| 4. | Also called crossover voter. U.S. Politics. a member of one political party who votes for the candidate of another party in a primary. |
| 5. | crossover network. |
| 6. | Railroads. a track structure composed of two or more turnouts, permitting movement of cars from either of two parallel and adjacent tracks to the other. |
| 7. | Dance.
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| 8. | Bowling. a ball that strikes the side of the head pin opposite to the bowling hand of the bowler. |
| 9. | (in plumbing) a U-shaped pipe for bypassing another pipe. |
