a. Also 8–9 exerciseable, 8 -ible. [f. next + -ABLE.] Of an office, power, right, etc.: Capable of being exercised, employed or enforced.

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1741.  T. Robinson, Gavelkind, II. ii. 170. Not only Lands, and other corporeal Inheritances…; but also all Inheritances … annexed to, or exerciseable within the same.

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1767.  Blackstone, Comm., II. iii. 20. Exercisible within the same.

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1818.  Cruise, Digest (ed. 2), III. 127. Judicial offices … are only exerciseable by persons of skill and capacity.

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1882.  J. H. Blunt. Ref. Ch. Eng., II. 38. Spiritual powers which are exercisable in all parts of the world.

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