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1. A small slit in a garment or piece of fabric for fastening a button.
2. Chiefly British A boutonniere.
tr.v. but·ton·holed, but·ton·hol·ing, but·ton·holes
1. To make a buttonhole in.
2. To sew with a buttonhole stitch.
3. To accost and detain (a person) in conversation: "He was also frequently buttonholed by White House lobbyists" (Terence Moran).
[V., sense 3, probably alteration of button-hold.]
a person who buttonholes