Definition of "undershirt" []

• An upper undergarment, typically having short or no sleeves, worn next to the skin under a shirt. (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.

• "Listen, I'm looking at this photo of Ripley in her underwear, from the original -- the undershirt is the same, but these briefs -- I think maybe they aren't really women's briefs, I think these are men's, like a Speedo version of undies."
• "During the winter a shirt with an undershirt is usually sufficient except on overcast and colder days when a light jacket will help."
• "But from my personal experience during the spring, summer and fall a shirt without undershirt is usually comfortable except on the very hottest days."