Definition of "adjacent"

It would be false to suggest CBD is nothing more than an obsession for reiki-adjacent bicoastal millennials.

2018 October 27, Alex Williams, “Why Is CBD Everywhere?”, in The New York Times‎

First of all, she's probably the most popular politics-adjacent figure in the country. She's not a politician. She's never run for anything, but I have said for a long time – I think we all agree – if she did ever want to run for something, she would be right at the front of the line.

2018 December 25, “Faith Leaders Speak about Leading Through Natural Disasters; Who's Been Naughty and Nice in 2018 Politics?”, in New Day‎, Chris Cillizza (actor), via CNN, retrieved July 27, 2019

Again, the key colors have twice the area of the adjacents.

1980, Faber Birren, The textile colorist

Picking out the opposite, the adjacent, and the hypotenuse […]

2011, Mark Zegarelli, ACT Math For Dummies, page 194

While Amazon has increasingly become a one-stop shop for some people, we’re also seeing a large proliferation of online companies looking to connect with users wherever they happen to be spending the most time, whether that’s on a social media platform, or on a site that caters to interests adjacent to the businesses’s own — and most importantly not necessarily on the company’s own web properties.

2008 March 27, Ingrid Lunden, “Braintree launches Extend to integrate loyalty, fraud prevention and other services into payments”, in TechCrunch‎, retrieved July 26, 2019