opt in
B1 neutral intransitive
In simple words
To say 'yes, include me' when given a choice to join something.
Literal meaning: To choose (opt) to be in (included).
Meanings
1 B1 neutral
To actively choose to take part in a programme, system, or service, especially when participation is not automatic.
"You can opt in to receive our monthly newsletter by ticking the box below."
2 B1 neutral
To choose to join or be included in a group decision, arrangement, or legal scheme.
"Employees were given the option to opt in to the new performance bonus scheme."
Usage notes
Common in marketing, data privacy (GDPR), healthcare, and legal contexts. An 'opt-in' system requires active consent. The opposite is 'opt-out'. Widely used in digital contexts (email lists, cookie consent).
Commonly used with
newsletter programme scheme data sharing marketing emails pension trial
Forms
Base
opt in
I/you/we/they
3rd person
opts in
he/she/it
Past simple
opted in
yesterday
Past participle
opted in
have + pp
-ing form
opting in
continuous
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