1) Bright 2) Celebrated 3) Eminent 4) Famed 5) Famous 6) Far-famed 7) Great 8) Having or conferring glory 9) Highly distinguished 10) Known 11) Luminous 12) Notable 13) Noted 14) Of great renown 15) Prominent 16) Renowned 17) Well-known 18) Widely known and esteemed Found on https://www.crosswordclues.com/clue/illustrious
Il·lus'tri·ous adjective [ Latin illustris , probably for illuxtris ; from il- in + the root of lucidus bright: confer French illustre . See Lucid .] 1. Possessing luster or brightness; brilliant; luminous; splendid. « Quench the light; thine... Found on http://www.encyclo.co.uk/webster/I/10
HMS Illustrious was a British Illustrious Class fleet aircraft carrier of 23000 tons displacement launched in 1939. HMS Illustrious was powered by six Admiralty 3-drum type boilers providing a top speed of 31 knots. She was armed with sixteen 4.5 inch dual-purpose guns plus 40 mm and 20 mm anti-aircraft guns. She carried a crew of 1600 and sixty ai... Found on http://www.probertencyclopaedia.com/browse/RI.HTM
illustrious, illustriously 1. Extremely distinguished and deservedly famous. 2. Possessing luster by reason of high birth or rank, noble or lofty action or qualities; distinguished, eminent; renowned, famous. Found on http://www.wordinfo.info/words/index/info/view_unit/1220/
highly distinguished; renowned; famous: an illustrious leader. · glorious, as deeds or works: many illustrious achievements. · luminous; bright. Found on https://www.infoplease.com/dictionary/illustrious