The largest toe (usually) on each human foot (i.e. the toe closest to the other foot when the feet are flat on the ground, side by side, and the legs not crossed) or on a foot of certain other animals.
The tip of the toe.
Standing elevated, on or as if on the tips of one's toes.
Moving carefully, quietly, warily or stealthily, on or as if on the tips of one's toes.
To walk quietly with only the tips of the toes touching the ground.