1. a small round or flat piece used to fasten clothing by passing it through a hole
2. a small device that you press to operate a machine or electronic device
3. a small round object worn as decoration or to show support for something

1. to fasten something with buttons
2. to press a button on a device

Examples

• She sewed a new button on her coat.
• Press the red button to start the machine.
• He wore a campaign button on his jacket.
• Please button your shirt before going outside.
• Button the elevator to go to the third floor.
• The button fell off my favorite sweater.
• Click the save button to store your work.