Definition of "buttonholer" []

• One who makes buttonholes; also, a machine designed to be used in making buttonholes. (noun)
• One who buttonholes another. (noun)

The Century Dictionary (Public Domain)

• "Automatic buttonholer Sews a buttonhole in one step, eliminating the need to stop and turn the fabric or manipulate selector dials."
• "This feature is preferable to a four-step buttonholer, which makes a buttonhole with a forward zigzag stitch, bar tack, reverse zigzag, and finishing tack."
• "I think this pattern must have been used for an advert for a button maker or a buttonholer for a sewing machine."