Définitions
1.NounHalf of the celestial sphere, as divided by either the ecliptic or the celestial equator .mw-parser-output .defdate{font-size:smaller}.
2.NounA realm or domain of activity .
3.NounHalf of the Earth, such as the Northern Hemisphere, Southern Hemisphere, Western Hemisphere or Eastern Hemisphere, Land Hemisphere, Water Hemisphere etc. .
4.NounAny half-sphere, formed by a plane intersecting the center of a sphere. .
5.NounA map or projection of a celestial or terrestrial hemisphere .
6.NounEither of the two halves of the cerebrum. .