indigo
noun
in·di·go ˈin-di-ˌgō 
plural indigos or indigoes
1
: a deep reddish blue
2
: indigo plant
3
a
: a blue vat dye obtained from plants (such as indigo plants)
b
: the principal coloring matter C16H10N2O2 of natural indigo usually synthesized as a blue powder with a coppery luster
Example Sentences
Recent Examples on the Web The indigo is white, the sunflower leaves turned brown. 
oregonlive, 12 June 2022 Wild indigo, river cane, wild onion, hickory, bloodroot and sage are among the species that members of the tribe can now gather at Buffalo National River, which was established in 1972 as the country’s first national river. Sarah Kuta, Smithsonian Magazine, 22 Apr. 2022 Somehow his dark-indigo laundry always sneaks into your load of whites. Jenn Knott, The New Yorker, 8 Aug. 2022 Dark or murky indigo can suggest a break from intuition or a phase marked by judgment. Alesandra Dubin, Woman's Day, 15 July 2022 According to French brand Saint James, which has been creating Breton tops since 1889, a naval decree dictated the top would have 21 white stripes and 20 to 21 indigo blue stripes. CNN, 7 July 2022 This week, the Grammy-winning rapper took to Instagram to debut a new waist-length, half-up/half-down hairdo precisely highlighted with gradients of green, indigo and purple hues. Michelle Lee, PEOPLE.com, 14 Apr. 2022 The sleek tube’s flashy silver logo pops beautifully against the raw denim fabric; a dark indigo in perfect harmony with both Dior’s signature navy blue and Y2K’s leaning towards inky blue washes. Lauren Valenti, Vogue, 14 Apr. 2022 The Gullah Geechee are descendants of the African enslaved people brought over to work the rice, indigo and cotton plantations off the coasts of South Carolina, North Carolina, Georgia and Florida. Washington Post, 1 Apr. 2022 See More
oregonlive, 12 June 2022 Wild indigo, river cane, wild onion, hickory, bloodroot and sage are among the species that members of the tribe can now gather at Buffalo National River, which was established in 1972 as the country’s first national river. Sarah Kuta, Smithsonian Magazine, 22 Apr. 2022 Somehow his dark-indigo laundry always sneaks into your load of whites. Jenn Knott, The New Yorker, 8 Aug. 2022 Dark or murky indigo can suggest a break from intuition or a phase marked by judgment. Alesandra Dubin, Woman's Day, 15 July 2022 According to French brand Saint James, which has been creating Breton tops since 1889, a naval decree dictated the top would have 21 white stripes and 20 to 21 indigo blue stripes. CNN, 7 July 2022 This week, the Grammy-winning rapper took to Instagram to debut a new waist-length, half-up/half-down hairdo precisely highlighted with gradients of green, indigo and purple hues. Michelle Lee, PEOPLE.com, 14 Apr. 2022 The sleek tube’s flashy silver logo pops beautifully against the raw denim fabric; a dark indigo in perfect harmony with both Dior’s signature navy blue and Y2K’s leaning towards inky blue washes. Lauren Valenti, Vogue, 14 Apr. 2022 The Gullah Geechee are descendants of the African enslaved people brought over to work the rice, indigo and cotton plantations off the coasts of South Carolina, North Carolina, Georgia and Florida. Washington Post, 1 Apr. 2022 See More Word History
Etymology
Italian dialect, from Latin indicum, from Greek indikon, from neuter of indikos Indic, from Indos India
First Known Use
1555, in the meaning defined at sense 3a
Phrases Containing indigo
Kids Definition
indigo
noun
in·di·go ˈin-di-ˌgō
plural indigos or indigoes
1
: a blue dye made artificially or obtained especially formerly from plants ( indigo plants )
2
: a deep purplish blue
Medical Definition
indigo
noun
in·di·go ˈin-di-ˌgō
plural indigos or indigoes
1
a
: a blue dye obtained from indigo plants (as Indigofera tinctoria of Africa and India, I. anil of South America, and I. auriculata of Arabia and Egypt)
b
: the principal coloring matter C16H10N2O2 of natural indigo usually synthesized as a blue powder with a coppery luster
called also indigotin
2
: indigo plant