A bike with a single gear, similar to the days gone by when bikes didn't need a realm of cogs to propell itself forward. This is of course a free hub, not a fixie.
Dom was a pervert, he converted his geared mtb to a single speed.
by toby1 June 01, 2007
A bicycle with one gear, esp. a mountainbike with one gear.
I love passing the gearies on my singlespeed!
by BontyRider April 24, 2006