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1.
describing an item that has only the most basic and necessary features to it; strictly functional; utilitarian
I looked into getting an upgrade for my cell phone, told the sales rep I just wanted something bare bones (i.e. a unit strictly for making/receiving telephone calls).

turns out that's impossible these days, since even the most basic phones have cameras and mp3 players as standard features now!
by Bungalow Bill September 10, 2006
 
2.
A simple computer that you can buy that usually includes the motherboard, case, a stick of RAM, and a floppy drive. You need to buy other components such as the operating system to make it work.
I bought a barebone system from a local computer store last week.
by Dragonboy June 23, 2005
 
3.
A basic computer system, typically features the chassis (housing-case), motherboard, a stick of RAM, and a floppy disk drive].
If your budget is low, a barebone system is usually a good choice to buy, because it only costs half as much as a pre-built system if you buy the rest of the parts at a used computer store.
by AYB August 02, 2003
 
4.
1. The name of the parliament created by Oliver Cromwell in the 1600's as a result of monarchy being removed.
2. An extension of the word "bare", meaning lots of, or excessive amounts of.
1.Oliver Cromwell set up the Barebones Parliament.
2. Rob:Hey bro, you got any money you can lend me?
Allen: yeah! i got barebones!
by aaamanion March 29, 2009
 
5.
when boning with no condom or no lube
that horse just bareboned that cameron porter
by bonningham January 27, 2010