[me.di.um] n, pl mediums or me.dia [L, fr. neuter of medius middle--more at mid] (1593) 1 a: something in a middle position b: a middle condition or degree: mean
2: a means of effecting or conveying something: as a (1): a substance regarded as the means of transmission of a force or effect (2): a surrounding or enveloping substance (3): the tenuous material (as gas and dust) in space that exists outside large agglomerations of matter (as stars) "interstellar ~" b pl usu media (1): a channel or system of communication, information, or entertainment--compare mass medium (2): a publication or broadcast that carries advertising (3): a mode of artistic expression or communication (4): something (as a magnetic disk) on which information may be stored c: go-between, intermediary d pl mediums: an individual held to be a channel of communication between the earthly world and a world of spirits e: material or technical means of artistic expression 3 a: a condition or environment in which something may function or flourish b pl media (1): a nutrient system for the artificial cultivation of cells or organisms and esp. bacteria (2): a fluid or solid in which organic structures are placed (as for preservation or mounting) c: a liquid with which pigment is mixed by a painter usage see media
[2]medium adj (1711): intermediate in quantity, quality, position, size, or degree