Definition of "underarm" []

• Located, placed, or used under the arm. (adjective)
• Sports Executed with the hand brought forward and up from below the level of the shoulder; underhand. (adjective)
• With an underarm motion or delivery. (adverb)
• The armpit. (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.

• "From the photo (on Grumperina's blog?), the sleeves seem to be very stretchy and slightly set in; the "underarm" stretches enough to cover the shoulder point without being too bulky under the arms."
• "For instance, in the 1960s and 1970s, over two-thirds of all CFCs manufactured in the world were incorporated in aerosol cans for consumer products, such as underarm deodorants and shaving creams."
• "However, I have noticed that the laundry detergent has a difficult time tackling stains such as underarm stains or grease spots."