What is "to top off"

Top \Top\, v. t.

1. To cover on the top; to tip; to cap; -- chiefly used in the past participle.

   Like moving mountains topped with snow.
   --Waller.

   A mount Of alabaster, topped with golden spires.
   --Milton.

2. To rise above; to excel; to outgo; to surpass.

   Topping all others in boasting.
   --Shak.

   Edmund the base shall top the legitimate.
   --Shak.

3. To rise to the top of; to go over the top of.

   But wind about till thou hast topped the hill.
   --Denham.

4. To take off the or upper part of; to crop.

   Top your rose trees a little with your knife.
   --Evelyn.

5. To perform eminently, or better than before.

   From endeavoring universally to top their parts, they will go universally beyond them.
   --Jeffrey.

6. (Naut.) To raise one end of, as a yard, so that that end becomes higher than the other.

7. (Dyeing) To cover with another dye; as, to top aniline black with methyl violet to prevent greening and crocking.

8. To put a stiffening piece or back on (a saw blade).

9. To arrange, as fruit, with the best on top. [Cant]

10. To strike the top of, as a wall, with the hind feet, in jumping, so as to gain new impetus; -- said of a horse.

11. To improve (domestic animals, esp. sheep) by crossing certain individuals or breeds with other superior.

12. (Naut.) To raise one end of, as a yard, so that that end becomes higher than the other.

13. To cut, break, or otherwise take off the top of (a steel ingot) to remove unsound metal.

14. (Golf) To strike (the ball) above the center; also, to make (as a stroke) by hitting the ball in this way. To top off,

    1. to complete by putting on, or finishing, the top or uppermost part of; as, to top off a stack of hay; hence, to complete; to finish; to adorn.

    2. to completely fill (an almost full tank) by adding more of the liquid it already contains.