(simile) Very bright (clever, smart, or crafty) / (simile) Very cheery, energetic and upbeat.

An emergency button which, when pressed, alerts authorities of danger or triggers an alarm system.

present participle of button up

simple past tense and past participle of button up

Alternative form of buttoned-up

(graphical user interface) A radio button.

(video games) A button on a joystick or joypad that corresponds to the action of firing a weapon, but often represents other in-game actions.

(construction) indenting two or more thicknesses of metal that are pressed against each other to prevent slippage between the metal.

plural of button man

(slang) A contract killer; a professional assassin.