D defs.my
Entry 2 senses Webster, 1913

Stepping-stone

· Step·ping-stone · IPA
01 n. A stone to raise the feet above the surface of water or mud in walking.
  1. 1.
    A stone to raise the feet above the surface of water or mud in walking.
  2. 2.
    Fig.: A means of progress or advancement.
    “These obstacles his genius had turned into stepping-stones.” Macaulay.
    “That men may rise on stepping-stones Of their dead selves to higher things.” Tennyson.