Definitions of Noble:

• noun:   a titled peer of the realm
• adjective:   having high moral qualities

  Example: "A noble spirit"

• adjective:   having or showing or indicative of high or elevated character

  Example: "A noble spirit"

• adjective:   of or belonging to or constituting the hereditary aristocracy especially as derived from feudal times

  Example: "Of noble birth"

• adjective:   inert especially toward oxygen

  Example: "A noble gas such as helium or neon"

• adjective:   impressive in appearance

  Example: "A noble tree"

• name:  A surname (common: 1 in 5882 families; popularity rank in the U.S.: #691)
• name:  A male given name (rare: 1 in 20000 males; popularity rank in the U.S.: #1004)