a : something which is formed by casting in a mold or variety: which include (one) : a replica (as of the statue) in steel or plaster : casting (2) : a fossil reproduction of the main points of the normal object by mineral infiltration b : an impact taken from an object with a liquid or plastic compound : this site mould They designed a mask from the wax cast of her confront.
: a mass of plastic issue formed in cavities of diseased organs (as the kidneys) and discharged from the human body
supporting cast A part of the movie's achievements lies within the energy with the supporting cast (= the actors who were not taking part in the principle pieces).