Buttonhole/ˈbʌtnhəʊl/ Definition 1 of 2Pro Tip 1/3Clothing Focus Buttonhole refers specifically to the part of clothing that receives the button. He sewed a buttonhole onto his jacket. Pro Tip 2/3Sewing Term Use 'buttonhole' to talk about the design or sewing process of garments. I need to make the buttonholes on this dress a bit larger. Pro Tip 3/3Precise Fit A buttonhole must accurately fit the button's size for proper function. The tailor carefully measured the buttons to create precise buttonholes.