medium

• Noun

  1. The material of the surrounding environment, e.g. solid, liquid, gas, vacuum, or a specific substance such as a solvent.
  2. The materials or empty space through which signals, waves, or forces pass.
  3. A format for communicating or presenting information.
  4. A nutrient substance, commonly a solution or solid, for the growth of cells in vitro.
  5. A substance, structure, or environment in which living organisms subsist, grow or are cultured.
  6. A means, channel, agency or go-between through which communication, commerce, etc is conveyed or carried on, or by which an aim is achieved.
  7. The materials used to finish a workpiece using a mass finishing or abrasive blasting process.
  8. A liquid base which carries pigment in paint.
  9. A means of expression, in the arts, such as a material (oil, pastel, clay, etc) or method or style (expressionism, jazz, etc).
  10. The mean or middle term of a syllogism, that by which the extremes are brought into connection.
  11. Someone who supposedly conveys information from the spirit world.
  12. A middle place or degree.
  13. An average; sometimes the mathematical mean.
  14. Anything of a middle rank or position.

• Adj
• Adv