The physical material, such as paper, disk, and tape, used for storing computer-based information. Media is plural; medium is singular.
(computing) (singular medium) In computing, the collective name for materials on which data can be recorded. For example, paper is a medium that can be used to record printed data; a floppy disc is a medium for recording magnetic data.

ETYM New Lat., from Latin medius middle.
(singular medium) Means of communication; the mass media comprise the broadcast media of radio and television, and the print media of newspapers and magazines.
Transmissions that are disseminated widely to the public; SYN. mass media.
1 [Late Latin, from Latin, feminine of medius; from the voiced stops' being regarded as intermediate between the tenues and the aspirates]; a voiced stop.
2 [New Latin, from Latin]; the middle coat of the wall of a blood or lymph vessel consisting chiefly of circular muscle fibers.
3. A medium of cultivation, conveyance, or expression; especially; medium.

1. Borough in Pennsylvania (USA).
2. Village in Illinois (USA); zip code 61460.
3. Ancient country and province of Persian Empire sw Asia in nw modern Iran.