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sphere

 
Noun sphere has 7 senses
  1. sphere, domain, area, orbit, field, arena - a particular environment or walk of life; "his social sphere is limited"; "it was a closed area of employment"; "he's out of my orbit"
    --1 is a kind of environment
    --1 has particulars:
     distaff; front; kingdom, land, realm; lap; political arena, political sphere; preserve; province, responsibility
  2. sphere - any spherically shaped artifact
    --2 is a kind of
    artifact, artefact
    --2 has particulars: globe
  3. sphere, sphere of influence - the geographical area in which one nation is very influential
    --3 is a kind of geographical area, geographic area, geographical region, geographic region
  4. sector, sphere - a particular aspect of life or activity; "he was helpless in an important sector of his life"
    --4 is a kind of aspect, facet
    --4 has particulars: department
  5. sphere - a solid figure bounded by a spherical surface (including the space it encloses)
    --5 is a kind of
    round shape
    --5 has particulars: conglomeration, conglobation; ball, globe, orb
  6. sphere - a three-dimensional closed surface such that every point on the surface is equidistant from the center
    --6 is a kind of
    round shape
    --6 has parts: steradian, sr
  7. celestial sphere, sphere, empyrean, firmament, heavens, vault of heaven, welkin - the apparent surface of the imaginary sphere on which celestial bodies appear to be projected
    --7 is a kind of surface
    --7 has parts:
     apex, solar apex, apex of the sun's way; celestial point; nadir; zenith; zodiac
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