1. a middle state or condition; something in the middle
2. a means of communication or artistic expression
3. a substance through which something travels or acts

1. in the middle between extremes of size, degree, or amount

Examples

• She ordered a medium pizza for the group.
• Television is a powerful medium for advertising.
• Sound waves travel through the medium of air.
• The artist works in the medium of watercolor.
• The medium claimed to contact his deceased grandmother.
• He prefers his steak cooked medium.
• The shirt comes in small, medium, and large sizes.