photo finish—
1. (Racing ) a finish so close that only a photograph can decide the winner:
- In the tense, final moments of the race she had craned forward with the rest to watch the photo finish.
2. a very close contest in an election, etc.:
- A photo finish was predicted by public opinion polls. The final one showed M. Mitered winning on the second ballot…
photo finishing—the process of producing prints from negatives:
- In the photographic chemicals market the company offers a range of chemicals for photo finishing.