- 1[countable] the furthest point, end or limit of something The lake is situated at the eastern extremity of the mountain range. We traveled the whole distance between the two extremities of the island.
- 2 [countable, uncountable] the degree to which a situation, a feeling, an action, etc. is extreme, difficult, or unusual the extremities/extremity of pain
- 3extremities [plural] (formal) the parts of your body that are furthest from the center, especially your hands and feet Cold extremities and a hot head are the first signs of the fever.