rich ‧ ness /ˈrɪtʃnəs, ˈrɪtʃnɪs/ BrE AmE noun [uncountable]
[ Word Family: noun : ↑ riches , ↑ richness , ↑ enrichment , the rich; adjective : ↑ rich , ↑ enriched ; verb : ↑ enrich ; adverb : ↑ richly ]
1 . if something has richness, it contains a lot of interesting things
richness of
the richness and diversity of the Amazonian rain forests
a literary work of remarkable richness and vitality
2 . the richness of a colour, taste, smell, or sound is the quality that makes it rich
richness of
the richness of the autumn colours