medium definition

1. a means or instrumentality for storing or communicating information
2. the surrounding environment
• examples: fish require an aqueous medium
3. an intervening substance through which signals can travel as a means for communication
4. a liquid with which pigment is mixed by a painter
5. (biology) a substance in which specimens are preserved or displayed
6. an intervening substance through which something is achieved
• examples: the dissolving medium is called a solvent
7. a state that is intermediate between extremes; a middle position
• examples: a happy medium
8. someone who serves as an intermediary between the living and the dead
• examples: he consulted several mediums
9. (usually plural) transmissions that are disseminated widely to the public
10. (meat) cooked until there is just a little pink meat inside