Definitions of roast:

• noun:   a piece of meat roasted or for roasting and of a size for slicing into more than one portion
• noun:   negative criticism
• verb:   cook with dry heat, usually in an oven

  Example: "Roast the turkey"

• verb:   subject to laughter or ridicule

  Example: "His former students roasted the professor at his 60th birthday"

• adjective:   (of meat) cooked by dry heat in an oven