medium noun

1 means of expressing/communicating sth

ADJ. communication Radio is an important communication medium in many countries. | mass | print, written

PREP. through the ~ of The government communicates through the medium of television.

PHRASES a medium of communication

2 sth used for a particular purpose

ADJ. storage An optical disk is just another kind of electronic storage medium.

PREP. ~ for she used her novels as a medium for encouraging political debate. | ~ of the medium of study

PHRASES a medium of instruction (= a language used for teaching) English is the medium of instruction in many African countries.

3 material/form that an artist, etc. uses

ADJ. mixed media mixed media artwork

PREP. through a/the ~ | ~ of to express yourself through the medium of paint/poetry/drama