What is the meaning of noble?

noun

• A titled peer of the realm.
  • synonyms: Lord, nobleman

adjective

• Impressive in appearance.
  • usage: "a baronial mansion"; "an imposing residence"; "a noble tree"; "severe-looking policemen sat astride noble horses"; "stately columns"
  • synonyms: baronial, imposing, stately
• Of or belonging to or constituting the hereditary aristocracy especially as derived from feudal times.
  • usage: "of noble birth"
• Having or showing or indicative of high or elevated character.
  • usage: "a noble spirit"; "noble deeds"
• Inert especially toward oxygen.
  • usage: "a noble gas such as helium or neon"; "noble metals include gold and silver and platinum"