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opt in

British  

verb

  1. (intr, adverb) to choose to be involved in or part of a scheme, etc

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

If New York doesn’t opt in, New York donors can still take advantage of the tax credit—but only for donations to outfits in states that have opted in.

From The Wall Street Journal • May 10, 2026

Employees have to actively opt out to leave the program, rather than proactively opt in.

From MarketWatch • Apr. 30, 2026

The initiative will be open to all issuers that want to opt in, including those not listed on Nasdaq.

From The Wall Street Journal • Mar. 9, 2026

Those who have already left the military will not be affected unless they opt in.

From Barron's • Jan. 15, 2026

Many countries opt in because money laundering has also become a domestic political and economic concern.

From Crime and Corruption by Vaknin, Samuel

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