n. A soft undergarment worn by divers and astronauts
n. Any suit worn under another suit; a suit of underclothes.
the GNU version of the Collaborative International Dictionary of English
n. A suit worn under another suit; a suit of underclothes.
The Century Dictionary and Cyclopedia
n. A suit worn under or beneath another suit.
Word Usage
"He was, however, in much discomfort, as the armor and the scale metal undersuit weighed so much that the carpenters had to make him a special leaning board and chair to take some of the weight."