what is a seam
A seam on a piece of denim. The definition of a seam is the line of stitches that holds two pieces of fabric together. An example of a seam is the line on the shoulder of a shirt that joins a sleeve to the main part of a shirt. Seam means to join together. An example of to seam is to sew together the two fronts of a shirt. 1  a joining of two pieces of material with a line of stitches. 2  the line of stitches: sew a fine seam.  the material between the margin of each of the joined pieces and its outer edge: a one-inch seam.