noun

• A musician who plays a pipe.
• A bagpiper.
• A baby pigeon.
• A common European gurnard (Trigla lyra), having a large head, with prominent nasal projection, and with large, sharp, opercular spines.
• A sea urchin (Cidaris cidaris) with very long spines, native to the American and European coasts.
• (slang, obsolete) A broken-winded hack horse.
• A surname originating as an occupation.
• A female given name transferred from the surname, used since the mid-twentieth century, first by the American actress Piper Laurie.
• An American aviation manufacturer, Piper Aircraft Inc, named after early owner William T. Piper
• An airplane made by Piper
• Archaic form of pepper. [A plant of the family Piperaceae.]