a.

1. 普通的；常見的
   Smith is a very common last name in England.

   在英國史密斯是很常見的姓。

2. 一般的，平常的[Z][B]
3. 共同的，共有的[Z][（+to）]
   Common interests bind us together.

   共同的利益使我們結合在一起。

4. 公共的，公眾的[Z]
   We must all work for the common good.

   我們大家必須為公共的利益而工作。

5. 粗鄙的，低級的
6. 【數】共通的[Z][B]

n.

1. 公共用地，公有地[C]

adj.

1. occurring, found, or done often; not rare.
   ▸without special rank or position; ordinary.
   ▸(of a quality) of a sort to be generally expected:

   common decency.
   ▸of the most familiar type.
2. shared by two or more people or things.
   ▸belonging to or affecting the whole of a community:

   common land.
   ▸Mathematics  belonging to two or more quantities.
3. showing a lack of taste and refinement supposedly typical of the lower classes; vulgar.
4. Grammar  of or denoting a noun that refers to individuals of either sex (e.g. teacher) or belongs to a gender conventionally regarded as masculine or feminine.
5. Prosody  (of a syllable) able to be either short or long.
6. Law  (of a crime) of lesser severity.

n.

1. a piece of open land for public use.
2. a form of Christian service used for each of a group of occasions.
3. (also right of common) English Law  a person's right over another's land, e.g. for pasturage.