buttonhole Syllabification: (but·ton·hole)Pronunciation: /ˈbətnˌhōl/Translate buttonhole | into French | into German | into Italian | into Spanish Definition of buttonhole noun a slit made in a garment to receive a button for fastening. British a boutonnière. verb [with object] 1 informal attract the attention of and detain (someone) in conversation, typically against his or her will. 2make slits for receiving buttons in (a garment). buttonhole in other Oxford dictionaries Definition of buttonhole in the British & World English dictionary