Definition of noble adjective from the Oxford Advanced American Dictionary

noble

adjective
/ˈnoʊbl/
 
 
nobler
/ˈnoʊblər/
 
, noblest
/ˈnoʊbləst/
 
1 having fine personal qualities that people admire, such as courage, honesty, and care for othersa noble leadernoble idealsHe died for a noble cause.It was very noble of you to go so far to take him home. compare ignoble2 very impressive in size or quality synonym splendida noble building3 belonging to the nobility (= families of high social rank) synonym aristocratica man of noble birthone of the noblest families in Portugal nobly
/ˈnoʊbli/
 
adverbShe bore the disappointment nobly.to be nobly born