Apex or topmost point (4)
I believe the answer is:
peak
(Other definitions for peak that I've seen before include "High point" , "Tip" , "Summit, often pointed" , "Pointed mountain" , "Reach the highest point" .)
I believe the answer is:
peak
(Other definitions for peak that I've seen before include "High point" , "Tip" , "Summit, often pointed" , "Pointed mountain" , "Reach the highest point" .)