1.
Leggings are close-fitting trousers, usually made out of a stretchy fabric, that are worn by women and girls.
N-PLURAL: also a pair of N
2.
Leggings are an outer covering of leather or other strong material, often in the form of trousers, that you wear over your normal trousers in order to protect them.
...a pair of ~ to slip on over your other clothes.
N-PLURAL: also a pair of N