Primum mobile

noun

/-leɪ/

Word Frequency: 0.1

Definitions

1.nounThe outermost celestial sphere of the heavens in Ptolemaic astronomy, which was believed to cause all the inner spheres to rotate.

2.nounThe prime mover or first cause.

3.noun(by extension) The person or thing that is the main impetus for some action; a driving force.

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