SINCE 1828
opt in
phrasal verb
opted in;
opting in;
opts in
Definition of opt in
: to choose to do or be involved in something
The company offered a new health insurance plan so that more workers would opt in.
Comments on opt in
What made you want to look up opt in? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
Words from Greek and Latin Quiz
-
- Which of the following months comes from a Latin word for “ten”?
Test your visual vocabulary with our 10-question challenge!
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Word Games
Share opt in
Resources for opt in