common

adjective:occurring, found, or done often; usual
- It is common to feel nervous before an exam.
adjective:belonging to or shared by all members of a group or community
- They have a common goal of improving the environment.
adjective:not rare; widespread
- The common cold spreads easily during the winter months.
adjective:of low quality or lacking refinement; ordinary or vulgar
- He served a common stew that lacked any special flavor.
noun:a piece of land or area belonging to a community for public use
- The children played football on the village common.
noun:the general public or the masses; ordinary people
- The new tax law was designed to benefit the common.