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Of celestial bodies, first the sun, / A mighty sphere, he framed.
2011 July 6, Piers Sellers, The Guardian:
So your orientation changes a little bit but it sinks in that the world is a sphere, and you're going around it, sometimes under it, sideways, or over it.
(astronomy, now rare) The celestial sphere: the edge of the heavens, imagined as a hollow globe within which celestial bodies appear to be embedded.
1635, John Donne, His parting form her:
Though cold and darkness longer hang somewhere, / Yet Phoebus equally lights all the Sphere.
1791, Erasmus Darwin, The Economy of Vegetation, J. Johnson, page 190:
Resistless rolls the illimitable sphere, / And one great circle forms the unmeasured year.
(historical,astronomy,mythology) Any of the concentric hollow transparent globes formerly believed to rotate around the Earth, and which carried the heavenly bodies; there were originally believed to be eight, and later nine and ten; friction between them was thought to cause a harmonious sound (the music of the spheres).
...while his sweet and gentle niece would be a charming companion for Francesca; and he thought, with a glow of affection long unfelt, that Lucy Aylmer must inevitably make a friend whose future kindness might add much to her happiness. Both were at present placed out of their sphere: but the one would in all probability have it greatly in her power to cherish and aid the other.
a.1856, William Hamilton, “Appendix III: Quantification of Predicate,—Immediate Inference,—Conversion,—Opposition”, in Lectures on Metaphysics and Logic, volume 2, published 1860, page 526:
In point of fact, so often as we think a subject as partially included within the sphere of a predicate, eo ipso we think it as partially, that is, particularly, excluded therefrom.
1896, James Welton, A Manual of Logic, 2nd edition, volume 1, page 213:
All categorical propositions necessarily imply the existence of their subjects in the appropriate sphere; in affirmative propositions this involves the existence of the predicate in the same sphere; but in negative propositions the predicate does not necessarily exist in that particular sphere, though it does in some sphere.
Finally, the disjunctive judgment contains a relation of two or more propositions to each other—a relation not of consequence, but of logical opposition, in so far as the sphere of the one proposition excludes that of the other.
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Sphere all your lights around, above; Sleep, gentle heavens, before the prow; Sleep, gentle winds, as he sleeps now, My friend, the brother of my love.
Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing. (See the entry for “sphere”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)