n.[C]

1. 中间；中庸；适中
   There is a medium in all things.

   凡事都有中庸之道。

2. 媒介物，媒体；传导体[（+for）]
   Air is a medium for sound.

   空气是声音的传播媒介。

3. 手段，工具[（+of）]
   English is not the usual medium of instruction in our school.

   英语不是我校通常使用的教学语言。

4. 新闻媒介，传播媒介[P1]
   A good deal of adult education is accomplished by the mass media.

   成人教育的相当一部分是由大众传播媒介完成的。

5. （生物的）生活环境
   Water is the natural medium in which fish live.

   水是鱼类赖以生存的自然环境。

6. 【生】培养基
7. （艺术创作所用的）材料；（艺术的）表现方法
   Water color is an extremely difficult medium to work with.

   水彩画是一种极难掌握的绘画手法。

8. （复数为mediums）巫师，女巫

a.

1. 中间的，中等的，适中的
   The man is of medium height.

   这男人中等个儿。

2. （肉）烧得适中的，中等熟度的

n.

1. an agency or means of doing something.
   ▸the material or form used by an artist, composer, or writer.
2. a substance through which sensory impressions are conveyed or physical forces are transmitted.
3. a particular form of storage material for computer files, such as magnetic tape or discs.
4. a liquid (e.g. oil) with which pigments are mixed to make paint.
5. (pl. mediums)
   a person claiming to be able to communicate between the dead and the living.
6. the middle quality or state between two extremes.
7. the substance in which an organism lives or is cultured.

adj.