1 medium /ˈmiːdijəm/ noun
plural mediums or media /ˈmiːdijə/
1 medium
plural mediums or media /ˈmiːdijə/
Learner's definition of MEDIUM
plural mediums : something that is sold in a medium size : something that is the middle size when compared with things that are larger and smaller
plural usually media : a particular form or system of communication (such as newspapers, radio, or television)
see also media
: the materials or methods used by an artist
: the thing by which or through which something is done
plural mediums : a person who claims to be able to communicate with the spirits of dead people
formal : a surrounding condition or environment

happy medium

: a good choice or condition that avoids any extremes
2 medium /ˈmiːdijəm/ adjective
2 medium
Learner's definition of MEDIUM
: in the middle of a range of possible sizes, amounts, etc.
of meat : cooked to a point that is between rare and well-done
◊ Meat that is medium rare is cooked to a point between rare and medium, while meat that is medium well is cooked to a point between medium and well-done.

— medium