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This tool relates English terms to concepts from the SUMO ontology by means of mappings to WordNet synsets.

According to WordNet, the noun "sphere" has 7 sense(s).

105853100 a particular aspect of life or activity; "he was helpless in an important sector of his life".

113898899 a three-dimensional closed surface such that every point on the surface is equidistant from the center.

113899200 a solid figure bounded by a spherical surface (including the space it encloses).

114514039 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".

104274530 any spherically shaped artifact.

108521267 the apparent surface of the imaginary sphere on which celestial bodies appear to be projected.

108653570 the geographical area in which one nation is very influential.

Explore the word sphere on the WordNet web site.