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Meaning of “opt in” in the English Dictionary

"opt in" in Business English

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opt in

phrasal verb with opt uk   /ɒpt/ us   verb [I]
to choose to be part of an activity, arrangement, etc.: Company policy is to leave new workers out of the pension scheme, unless they choose to opt in.

opt-innoun [C or U]

uk   us  
the fact that you do not have, receive, or join in something unless you choose to, or something that you do not have or receive unless you choose it: Users have to click to give the company permission to collect data about their online habits, a process called opt-in. We have a company pensions policy where there is an opt-in instead of an opt-out.opt-in feature/system/policy The social networking site has introduced an opt-in feature for customers.
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(Definition of opt in from the Cambridge Business English Dictionary © Cambridge University Press)
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“opt in” in British English

“opt in” in Business English

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