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Webster 1913 Edition

Noun.

The band which encompasses the waist; esp., one on the upper part of breeches, trousers, pantaloons, skirts, or the like.

A sash worn by women around the waist.

[R.]

Noun.

The band or upper pat of breeches, trousers or pantaloons, which encompasses the waist.

waistband ‎(plural waistbands)

A band of fabric encircling the waist, especially a part of a pair of pants or a skirt.

band of fabric encircling the waist