Definitions of wax:

• noun:   any of various substances of either mineral origin or plant or animal origin; they are solid at normal temperatures and insoluble in water
• verb:   go up or advance
• verb:   increase in phase

  Example: "The moon is waxing"

• verb:   cover with wax

  Example: "Wax the car"

• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #11431)