DNF

Did Not Finish
Found on http://sports.specialolympics.org/specialo.org/Special_/English/Coach/Coach

DNF

Did not finish a race.
Found on http://www.dailypeloton.com/cyclegloss.asp

DNF

Did not finish a race.
Found on http://www.fcactivetravel.com/news/glossary-road-cycling-terms

DNF

did not finish; a cyclist who abandons a race.
Found on http://bikecult.com/bikecultbook/glossary_english.html

DNF

Did Not Finish.
Found on http://cycling.isport.com/cycling-guides/cycling-glossary

DNF

Did not finish.
Found on http://www.runnersworld.com/article/0,7120,s6-238-267--439-0,00.html

DNF

Digital National Framework, details ...
Found on http://www.cryer.co.uk/glossary/d/index.htm

DNF

See Digital National Framework.
Found on http://www.encyclo.co.uk/local/20195

DNF

Stands for "did not finish" and describes a runner who drops out of a race
Found on http://www.howtobefit.com/glossary-of-running.htm
No exact match found