noun
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a point equally distant from all points on the circumference of a circle or surface of a sphere; the centre of a circle.
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the point around which anything revolves; pivot.
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a) a place at or building in which an activity or complex of activities is carried on or forming a central point in a district, city, etc. or a main area for an activity; b) a place from which ideas, influences, etc. emanate; c) a place to which many people are attracted.
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the approximate middle point, place or part of anything.
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a main store or warehouse.
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in a federal system of government or union of states, the government having common authority or administration power over all the states; the central government.
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(astrol.) in the astrological diagram, the first or any of the fourth, seventh or tenth houses.