Medium

a means or instrumentality for storing or communicating information

the surrounding environment

an intervening substance through which signals can travel as a means for communication

(bacteriology) a nutrient substance (solid or liquid) that is used to cultivate micro-organisms

a liquid with which pigment is mixed by a painter

(biology) a substance in which specimens are preserved or displayed

an intervening substance through which something is achieved

a state that is intermediate between extremes

someone who serves as an intermediary between the living and the dead

(usually plural) transmissions that are disseminated widely to the public

an occupation for which you are especially well suited

around the middle of a scale of evaluation

(meat) cooked until there is just a little pink meat inside