Definition of pipe for English Language Learners. : 1  a long, hollow tube for carrying water, steam, gas, etc. : 2  a tube with a small bowl at one end that is used for smoking tobacco. : 3  a musical instrument that is in the shape of a tube, has holes along the top, and is played by blowing.
The Blood of Olympus (mentioned) Lupa is the immortal Roman wolf goddess who trains Roman demigods in the ways of Rome. She trains the demigods at the Wolf House, then sends them to Camp Jupiter where they can join the Twelfth Legion.
The horned cow-goddess of love, she was also the deity of happiness, dance and music, and a protector of women. She is depicted as a cow, as a woman with the head of a cow, or as a woman with who wears the stylized cow-horns which hold in them the solar disk. Her symbols also included the papyrus reed, the snake and a rattle called a sistrum - the sistrum representing her as the goddess of music and dancing.