Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- abbreviation radio frequency
- abbreviation right field
- abbreviation right fielder
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- initialism US, military, aviation  reconnaissance fighter ; an unarmed fighter modified for photo-reconnaissance (prefix)
- initialism electronics  Radio Frequency 
- initialism pathology Rheumatoid Factor
- initialism slang ratfuck A practical joke, especially a clever one. (Military and engineering slang)
- initialism   Russian Federation 
- initialism baseball  right field ,right fielder 
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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								Romcoms have to have likable leads, and RF is not that. 
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								If Kotsay misses any time, Bradley will move to CF, Swisher will take over in RF, and Dan Johnson will start at 1B. 
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								The RF is from satellite radio reaches Canada just fine. 
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								L. Scott LF 4 0 1 1 .200 C. Quentin RF 3 0 0 0 .371 USATODAY.com 2004 
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								C. Quentin RF 3 2 1 0 .295 K. Bibbs CF 4 0 0 0 .302 USATODAY.com 2004 
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								M. Franklin RF 3 1 3 3 .417 R. Calloway LF 5 0 1 1 .273 USATODAY.com 2004 
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								B. Martin RF 4 1 1 0 .260 R. Sasser 3B 3 0 0 0 .240 USATODAY.com 2004 
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								D. Matranga SS 4 0 0 0 .239 C. Quentin RF 4 1 1 2 .357 USATODAY.com 2004 
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								C. Benjamin RF 4 0 1 0 .187 D. Span CF 4 0 1 0 .267 USATODAY.com 2004 
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								B. Colamarino 1B 4 1 1 1 .270 C. Quentin RF 4 0 0 0 .357 USATODAY.com 2004 
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