Meanings
nounundersuit (plural undersuits)
plural undersuits
- A soft undergarment worn by divers and astronauts.
If you plan to dive all year round in the UK, you'll need a drysuit rather than a wetsuit. It won't let in water (a wetsuit traps a layer of water against the skin), but doesn't keep you warm, so you need a neoprene or membrane undersuit, too.
2006 December 8, “All you need to know about: Scuba diving”, in Alan Rusbridger, editor, The Guardian, London: Guardian News & Media, →ISSN, →OCLC, archived from the original on 28 Sep 2014 - Any suit worn under another suit; a suit of underclothes.
Origin
- Proto-Indo-European*h₁én
- Proto-Indo-European*h₁entér
- Proto-Indo-European*h₂én
- Proto-Indo-European*dʰeh₁-?
- Proto-Indo-European*(H)n̥dʰí
- Proto-Indo-European*(H)n̥dʰér
- Proto-Germanic*under
- Proto-West Germanic*undar
- Old Englishunder-
- Middle Englishunder-
- Englishunder-
- Englishsuit
- Englishundersuit
Cite this entry
APA
undersuit. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/undersuit
MLA
“undersuit.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/undersuit. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “undersuit,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/undersuit.
Source: undersuit on Wiktionary, CC BY-SA 4.0.