Entry 3 senses · 2 variants Webster, 1913 Piper /pīp'-ẽr/ · Pi·per · IPA /ˈpaɪ.pɚ/ n. n. 01 n. See Pepper. 1. See Pepper. See: Pepper 02 n. One who plays on a pipe, or the like, esp. on a bagpipe. 1. One who plays on a pipe, or the like, esp. on a bagpipe.(Mus.) 2. A common European gurnard (Trigla lyra), having a large head, with prominent nasal projection, and with large, sharp, opercular spines.(Zool.) Phrases & compounds To pay the piper — to bear the cost, expense, or trouble.