Noble here is used to describe a person or a thing of impressive contour or demeanor such as "impressive person," "stately mansion" or a "grave custodian."
Noble's use in this sense describes an individual of hierarchical origin such as a knight, king, military officer or judge.
Noble can refer to the different non-metal inert gases such as helium or neon.
A person of noble character is one who shows high level of integrity in his actions, thoughts and deeds.
Noble means someone who is virtuous and seeks to help others and acts for the welfare of others first.