using a battery as a source of power; -- of tools which usually use line current for power; as, cordless electric drills are very convenient for use outdoors; cordless razors make shaving while travelling easy.
Cordless appliances offer a number of advantages over Corded ones. Power cords can be kept shorter and the appliance can simply be picked up and replaced on the base during use. The standard cordless system is used with Immersed Heater Systems.
The term cordless literally means without a cord and is generally used to refer to powered electrical or electronic devices that are able to operate from a portable power source (e.g., a battery pack) without any cable or "cord" to limit the mobility of the device through connection to a fixed electrical supply such as an outlet, generator, or other centralized power source. http://www.wordreference.com/definition/cordlesshttp://www.answers.com/topic/cordlesshttp://www.thefreedictionary.com/cordless