No, taking something without paying is theft. Piracy has many definitions, but none of them that simple.

-Robbery or other serious acts of violence committed at sea.
-The hijacking of an airplane.
-Copyright or patent infringement.
-The illegal interception or use of radio or television signals.
-An instance of piracy.
-In geology, that process whereby, because of a higher natural gradient, and therefore more efficient eroding power, one stream cuts back a divide and taps off the head-waters or a tributary of another stream. The captured stream usually turns a sharp angle into its new course and leaves a wind-gap where it formerly flowed. Also called stream-piracy.
-Robbery upon the sea; robbery by pirates; the practice of robbing on the high seas.
-Literary theft; any unauthorized appropriation of the mental or artistic conceptions or productions of another; specifically, an infringement of the law of copyright.