WordNet sense 1 (of high or superior quality or performance):

superior

WordNet sense 2 (owed as a debt):

owing, owed, undischarged

WordNet sense 3 (of major significance or importance):

great

WordNet sense 4 (of great significance or value):

important, of import

WordNet sense 5 (having a quality that thrusts itself into attention):

prominent, salient, spectacular, striking

WordNet sense 6 (obvious to the eye or mind):

conspicuous