The term A-line line refers to a type of dress silhouette that is fitted at the waist and gradually flares out towards the HEM. This style of dress is often referred to as an A-line dress. The two crossword solutions for this term are SEAM (4 letters) and HEM (3 letters). A SEAM is a line of stitching that joins two pieces of fabric together, while a HEM is the edge of a garment that is folded up and stitched in place. Both of these elements are important components of an A-line dress, as they help to create the desired shape.