Collins English-English Dictionary

medium ['miːdɪəm]

1. 1. adj midway between extremes; average

   a medium size

2. 2. adj (of a colour) reflecting or transmitting a moderate amount of light - Compare light dark

   a medium red

3. 3. n an intermediate or middle state, degree, or condition; mean

   the happy medium

4. 4. n an intervening substance or agency for transmitting or producing an effect; vehicle

   air is a medium for sound

5. 5. n a means or agency for communicating or diffusing information, news, etc, to the public

   television is a powerful medium

6. 6. n a person supposedly used as a spiritual intermediary between the dead and the living

7. 7. n the substance in which specimens of animals and plants are preserved or displayed

8. 8. n short for culture medium

9. 9. n [biology] the substance or surroundings in which an organism naturally lives or grows

10. 10. n [art] the category of a work of art, as determined by its materials and methods of production

    the medium of wood engraving

11. 11. n the materials used in a work of art

12. 12. n any solvent in which pigments are mixed and thinned

13. 13. n any one of various sizes of writing or printing paper, esp 181/2 by 231/2 inches or 171/2 by 22 inches (small medium)

14. 14. n See also mediums

15. 15. n [Etymology] C16: from Latin: neuter singular of medius middle