'Hemmer' definitions:

Definition of 'Hemmer'

From: GCIDE

Hemmer \Hem"mer\, n. One who, or that which, hems with a needle. Specifically: (a) An attachment to a sewing machine, for turning under the edge of a piece of fabric, preparatory to stitching it down. (b) A tool for turning over the edge of sheet metal to make a hem. [1913 Webster]