button button /ˈbʌtən/

noun

1. () A round fastener sewn to shirts and coats etc to fit through buttonholes  ( button )
   a round fastener sewn to shirts and coats etc to fit through buttonholes
    I need to sew a button back onto my shirt
   I need to sew a button back onto my shirt
   
   
2. () An electrical switch operated by pressing  ( push , push button , button )
   an electrical switch operated by pressing
    The elevator was operated by push buttons
   the elevator was operated by push buttons
    The push beside the bed operated a buzzer at the desk
   the push beside the bed operated a buzzer at the desk
   
   
3. Any artifact that resembles a button  ( button )
   any artifact that resembles a button
   
4. A device that when pressed will release part of a mechanism  ( button , release )
   a device that when pressed will release part of a mechanism
   
   
5. A female sexual organ homologous to the penis  ( button , clit [Informal, Vulgar] , clitoris )
   a female sexual organ homologous to the penis
    The clitoris is a highly sensitive organ located above the vaginal opening
   The clitoris is a highly sensitive organ located above the vaginal opening
   
   
6. A round flat badge displaying information and suitable for pinning onto a garment  ( button )
   a round flat badge displaying information and suitable for pinning onto a garment
    They passed out campaign buttons for their candidate
   they passed out campaign buttons for their candidate
   
7. Any of various plant parts that resemble buttons  ( button )
   any of various plant parts that resemble buttons
   

verb

1. Fasten with buttons  ( button )
   fasten with buttons
    Button the dress
   button the dress
   
2. Provide with buttons  ( button )
   provide with buttons
    Button a shirt
   button a shirt