Definition of "long johns" []

• Informal Long, warm underwear. (noun-plural)

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.

• "Now that we had a bailout system, our pressure suits doubled as antiexposure suits and the long johns were intended to increase our survival time if we landed in the ocean."