When you say that someone's fingertip is touching the edge of the pool, you are saying that the person is very close to the edge of the pool.
He was only fingertipdeep in the pool.
The water was so cold that his fingertips were barely touching the surface.
noun
the end (tip) of a finger
1
Fingernails reach the end of the fingertips.
2
First, the strings may be depressed with the fingertips of the fretting hand.
3
The hand is held open while the fingertips are kept rigid.
4
His tail is prehensile, and his fingertips end in claws.
5
For magnetic implats under the fingertips.
6
But the diagram shows it from the armpit to the fingertips.
7
The bands are adapted to grip the user's fingertip.
8
He was rushed to hospital and the fingertip was re attached.
9
You delete entries at the touch of your fingertip.
10
I've wondered about the accuracy of the fingertip oxygen monitors.