noun ·see mean.
2. medium ·noun an average.
3. medium ·noun the liquid vehicle with which dry colors are ground and prepared for application.
4. medium ·noun a trade name for printing and writing paper of certain sizes. ·see paper.
5. medium ·noun the mean or middle term of a syllogism; that by which the extremes are brought into connection.
6. medium ·adj having a middle position or degree; mean; intermediate; medial; as, a horse of medium size; a decoction of medium strength.
7. medium ·noun that which lies in the middle, or between other things; intervening body or quantity. hence, specifically: (a) middle place or degree; mean.
8. medium ·noun a substance through which an effect is transmitted from one thing to another; as, air is the common medium of sound. hence: the condition upon which any event or action occurs; necessary means of motion or action; that through or by which anything is accomplished, conveyed, or carried on; specifically, in animal magnetism, spiritualism, ·etc., a person through whom the action of another being is said to be manifested and transmitted.