Definition of richness noun from the Oxford Advanced American Dictionary

 

richness

 noun
noun
NAmE//ˈrɪtʃnəs//
 
[uncountable]
 
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the state of being rich in something, such as color, minerals, or interesting qualities the richness and variety of marine life This new color will add warmth and richness to your natural hair shade. compare wealth
See the Oxford Advanced Learner's Dictionary entry: richness