on%20top%20of

preposition

1. 1

   Atop

2. 2

   Very close to, in any orientation or in time.

   “At peak times, a telephone operator must handle a number of calls, one on top of the next.”

3. 3

   In addition to something else.

   “[...] and on top of all that, I got a puncture!”

4. 4

   Fully informed about, and in control of, something; up to speed with.

   “I have sorted out the problems and am now on top of the situation.”