Definition from Wiktionary, the free dictionary
tights (plural only)
- A close-fitting, sheer or non-sheer skin-tight garment worn principally by women and girls that covers the body completely from the waist down, usually including the feet.
- A similar, non-sheer garment worn by dancers of either sex, especially by ballet dancers.
- In blasting rock, a piece of unbroken rock within the pay limit of a blast.
US English uses the term pantyhose to refer to sheer tights.