The term "sheer" refers to something that is very thin, transparent, or delicate. It is often used to describe fabrics, such as sheer curtains or sheer clothing, which allow light to pass through while providing minimal coverage. The quality of being sheer can also imply a sense of lightness or fragility. In a broader context, "sheer" can describe an extreme degree of something, such as sheer determination or sheer size. In this sense, it emphasizes the intensity or magnitude of a characteristic, highlighting how significant or overwhelming it can be in a particular situation.