Pipe Meaning

(music) A hollow tube used to produce sound in an organ; an organ pipe. [from 14thc.]

Example: The key or sound of the voice. [from 16thc.]
  (Can we find and add a quotation of Shakespeare to this entry?)
A high-pitched sound, especially of a bird. [from 18thc.]
Alfred Tennyson (1809-1892)
  the earliest pipe of half-awakened birds