Definitions of inferior:

• noun:   one of lesser rank or station or quality
• noun:   a character or symbol set or printed or written beneath or slightly below and to the side of another character
• adjective:   of or characteristic of low rank or importance
• adjective:   of low or inferior quality
• adjective:   having an orbit between the sun and the Earth's orbit

  Example: "Mercury and Venus are inferior planets"

• adjective:   lower than a given reference point

  Example: "Inferior alveolar artery"

• adjective:   inferior in rank or status
• adjective:   falling short of some prescribed norm
• adjective:   written or printed below and to one side of another character