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Webster's Dictionary 1828 - Online Edition

Webster's Dictionary 1828

Americal Dictionary of the English Language

American Dictionary
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Celerity

CELERITY, noun

1. Rapidity in motion; swiftness; speed; applied most generally to bodies moving on or near the earth; as the celerity of horse or of a fowl. We speak of the velocity of sound or of light, or of a planet in its orbit. This distinction however is not general, nor can the different uses of the two words be precisely defined. We apply celerity rather than velocity to thought; but there seems to be no reason, except usage, why the two words should not be synonymous.

2. An affection of motion by which a movable body runs through a given space in a given time.