Definitions
1.nounAny of various substances designed to extend any of several properties of a material.
2.nounAny of various components designed to extend the length of a device.
3.nounAny substance added to food to bulk it out, with a higher protein content than a filler."Soy protein is used as a meat extender."
4.nounA runner, or quick-draw. (from sense #2)
5.nounA phrase that extends an expression to include further members of a set, e.g. "and stuff", "or something".