in ‧ di ‧ go /ˈɪndɪɡəʊ $ -ɡoʊ/ BrE AmE noun [uncountable]
[ Date: 1500-1600 ; Language: Italian ; Origin: Latin indicum , from Greek indikos 'Indian' ]
a dark purple-blue colour ⇨ purple
—indigo adjective
in ‧ di ‧ go /ˈɪndɪɡəʊ $ -ɡoʊ/ BrE AmE noun [uncountable]
[ Date: 1500-1600 ; Language: Italian ; Origin: Latin indicum , from Greek indikos 'Indian' ]
a dark purple-blue colour ⇨ purple
—indigo adjective
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012