IPA: /ˈnɔːrðərnmoʊst/
KK: /ˈnɔrðərnˌmoʊst/
The furthest point or area located in the north direction.
Greenland is the northernmost country in the world.
Northernmost → It is formed from "north" (from Old English *norð*, meaning the direction toward the North Pole) and "-ernmost" (a superlative suffix meaning furthest or most extreme). The word "northernmost" means the furthest point in the northern direction.
Think of the word 'north' as the direction toward the North Pole, and remember that 'northernmost' refers to the furthest point in that direction.