a round fastener sewn to shirts and coats etc. to fit through buttonholes

an electrical switch operated by pressing

any of various plant parts that resemble buttons

a round flat badge displaying information and suitable for pinning onto a garment

a female sexual organ homologous to the penis

a device that when pressed will release part of a mechanism

any artifact that resembles a button

a specific area or icon in graphical user interface systems that is clicked or pressed in order to select a command or perform an action