Definition of "hemisphere" []

• A half of a sphere bounded by a great circle. (noun)
• A half of a symmetrical, approximately spherical object as divided by a plane of symmetry. (noun)
• Either half of the celestial sphere as divided by the ecliptic, the celestial equator, or the horizon. (noun)
• Either the northern or southern half of the earth as divided by the equator or the eastern or western half as divided by a meridian. (noun)
• Anatomy Either of the lateral halves of the cerebrum; a cerebral hemisphere. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Frequently somebody coming to this hemisphere is accused of being a propagandist."
• "You know, the only reason that Beck and Limballs could see some kind of division based on the President responding to a natural disaster in our hemisphere is because they see the victims of that disaster as black people."
• "At a larger scale, the left hemisphere is somewhat specialized for positive experiences while the right hemisphere is more focused on negative ones (this makes sense since the right hemisphere is specialized for gestalt, visual-spatial processing, so it's advantaged for tracking threats coming from the surrounding environment)."