medium

(noun) a means or instrumentality for storing or communicating information.

(noun) the surrounding environment. Example: "Fish require an aqueous medium."

(noun) an intervening substance through which signals can travel as a means for communication.

(noun) (bacteriology) a nutrient substance (solid or liquid) that is used to cultivate micro-organisms. Synonyms: culture medium.

(noun) a liquid with which pigment is mixed by a painter.

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

(noun) an intervening substance through which something is achieved. Example: "The dissolving medium is called a solvent."

(noun) a state that is intermediate between extremes; a middle position. Example: "A happy medium."

(noun) someone who serves as an intermediary between the living and the dead. Synonyms: spiritualist, sensitive. Example: "He consulted several mediums."

(noun) (usually plural) transmissions that are disseminated widely to the public. Synonyms: mass medium.

(noun) an occupation for which you are especially well suited. Synonyms: metier. Example: "In law he found his true metier."

(adj) around the middle of a scale of evaluation. Synonyms: average, intermediate. Examples: "An orange of average size." "Intermediate capacity." "Medium bombers."

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