A-line Definition
ālīn
adjective
Having a fitted top and a flared bottom.
An A-line dress.
American Heritage
Fitting close at the top and flaring at the bottom.
Webster's New World
Having a silhouette that replicates the letter A by flaring out from the top, like a funnel, narrow and fitted at the neck and shoulders, skimming the hips and widening toward the bottom, with little or no shaping or seaming at the waist.
Wiktionary
noun
Any article of clothing with a narrow mid-section and a flared bottom.
Wiktionary
Other Word Forms of A-line
Noun
Singular:
A-line
Plural:
a-lines