/ ɪkˈstreməti; NAmE / noun ( pl. -ies )
1.
[ C ] the furthest point, end or limit of sth :
The lake is situated at the eastern extremity of the mountain range.
2.
[ C , U ] the degree to which a situation, a feeling, an action, etc. is extreme, difficult or unusual :
the extremities / extremity of pain
3.
extremities [ pl. ] ( formal ) the parts of your body that are furthest from the centre, especially your hands and feet
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WORD ORIGIN
late Middle English : from Old French extremite or Latin extremitas , from extremus utmost, superlative of exterus outer.