/ ˈbʌtnhəʊl; NAmE -hoʊl/ noun , verb
■ noun
1.
a hole on a piece of clothing for a button to be put through
2.
( BrE ) ( NAmE bou·ton·nière ) a flower that is worn in the buttonhole of a coat or jacket
■ verb
( informal ) [ vn ] to make sb stop and listen to you, especially when they do not want to