Definitions of common:

• noun:   a piece of open land for recreational use in an urban area
• adjective:   of or associated with the great masses of people

  Example: "The common people in those days suffered greatly"

• adjective:   to be expected; standard

  Example: "Common decency"

• adjective:   common to or shared by two or more parties

  Example: "A common friend"

• adjective:   of no special distinction or quality; widely known or commonly encountered; average or ordinary or usual

  Example: "The common man"

• adjective:   belonging to or participated in by a community as a whole; public

  Example: "For the common good"

• adjective:   commonly encountered

  Example: "A common (or familiar) complaint"

• adjective:   being or characteristic of or appropriate to everyday language

  Example: "Common parlance"

• adjective:   lacking refinement or cultivation or taste

  Example: "Behavior that branded him as common"

• adjective:   of low or inferior quality or value

  Example: "Produced...the common cloths used by the poorer population"

• name:  A surname (very rare: popularity rank in the U.S.: #36061)