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
Time Traveler Quiz: Which Word Came First?
-
- Which came first?
Can you spell these 10 commonly misspelled words?
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
-
Time Traveler Quiz: Which Word Came First?
Which word entered the English language first?
Take the quiz -
Slippery Words Quiz—Changing with the Times
Do you know these earlier meanings of words?
Take the quiz -
Spell It
Can you spell these 10 commonly misspelled words?
Take the quiz -
Word Winder's CrossWinder
Play the game
Share opt in
Resources for opt in