noun, noun which may take the genitive case particle 'no'
Refers to the very end or the most extreme point of something, often used in formal or abstract contexts.
この問題の終極的な解決策はまだ見つかっていない。
The ultimate solution to this problem has not yet been found.
彼の研究は物理学の終極理論を目指している。
His research aims at the ultimate theory of physics.
Compound of 終 (end) and 極 (extreme, pole), literally 'the extreme end'. The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning of 'ultimate' or 'final'.