Noun
an undergarment with shirt and drawers in one piece
Source: WordNetStill, thought I should put on my party frock, and perhaps even remove the long underwear. Source: Internet
Four main layers could consist of a combination similar to this: long underwear, turtleneck, sweater or fleece and outerwear. Source: Internet
I’d bet that you also have a thin, packable “layering” puffer that heats up hotter than a handful of ski beans, and long underwear. Source: Internet
Polypropylene long underwear should be worn next to the skin. Source: Internet
When I was growing up, I used to hate long underwear season. Source: Internet