major general

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A commissioned rank in the US Army, Air Force, or Marine Corps that is above brigadier general and below lieutenant general.
• noun One who holds this rank.

from The Century Dictionary.

• noun A military officer next in rank below a lieutenant-general.

from the GNU version of the Collaborative International Dictionary of English.

• An officer of the army holding a rank next above that of brigadier general and next below that of lieutenant general, and who usually commands a division or a corps.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A military officer in the armies of most nations, typically ranking below a lieutenant general and above a brigadier.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a general officer ranking above a brigadier general and below a lieutenant general