Definitions for a-lineˈeɪˌlaɪn
Random House Webster's College Dictionary
(in women's clothing) a cut of garment consisting of A-shaped panels with the widest portion at the hemline.
(adj.)being of such cut:
an A-line coat.
Origin of A-line:
Any article of clothing with the A-line silhouette.
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.
Origin: From A + line