- 1(anatomy) the layer of muscle between the lungs and the stomach, used especially to control breathing
- 2a rubber or plastic device that a woman places inside her vagina before having sex to prevent sperm from entering the womb and making her pregnant
- 3a device that controls the amount of light that enters a camera
- 4(technology) a thin disk used to turn electronic signals into sound, and sound into electronic signals in telephones, loudspeakers, etc.
Check pronunciation: diaphragm