Definition of "brushless" [brushless]

• Not using brushes, of a motor that does not use physical contacts for the commutator. (adjective)

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• "The synchronous type requires a direct current (DC) exitation, either from an external source (e.g. battery) or from an integrated exitation system, the latter of which are known as brushless, self-exitating generators."
• "Such machines are therefore called brushless alternators."
• "New motor technologies, generally known as brushless DC motors, or BLDCs, are slightly more expensive than equivalent induction motors, but rising volumes would help close this gap."