“Loosening the top button of his shirt, he made his way downstairs, trying to reinstate the legendary self-control that had gained him a reputation for being ice-cold.”
“There he was at the breakfast table, donning a crumpled black cap with a shiny button on the top.”
“The player cannot freely mash the button to thrust the sword. Instead, the game is designed such that players must first initiate a dramatic raising of the sword through a prolonged press of the button.”
(computing) The basic training required to start using a piece of software: what the components of the interface are, what they do, how to accomplish basic tasks.
buttonmould
(archaic) A disc of bone, wood, or other material, made into a button by covering it with cloth.