SINCE 1828
let someone know
idiomDefinition of let someone know
: to tell something to someone
Let me know if you're going to the party. Please let me know if there's anything I can do to help.
Comments on let someone know
What made you want to look up let someone know? 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 knowledge - and maybe learn something along the way.
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
-
Words from Greek and Latin Quiz
Finally! A use for those SAT prep classes.
Take the quiz -
Name That Thing: Animal Edition
How many animals can you identify?
Take the quiz -
True or False?
Test your knowledge - and maybe learn something along the way.
Take the quiz -
Syn City
Build a city of skyscrapers—one synonym at a time.
Play the game
Share let someone know
Resources for let someone know