Definition of piper

• n. - See Pepper.
• n. - One who plays on a pipe, or the like, esp. on a bagpipe.
• n. - A common European gurnard (Trigla lyra), having a large head, with prominent nasal projection, and with large, sharp, opercular spines.
• n. - A sea urchin (Goniocidaris hystrix) having very long spines, native of both the American and European coasts.