What Does Lmk Mean? image

  • Lmk is an abbreviation of let me know.
  • The abbreviation is used the same way the spelled-out phrase is used, but you should avoid it in formal communication.

When you need people to get back to you with additional information about something, lmk is one of the phrases you can use to ask for it.

The Meaning of Lmk

Lmk is short for let me know. People have been using it for at least fifteen years. By now it’s a staple of electronic communication.

What Does Lmk Mean? image

How to Use Lmk

Lmk is an abbreviation you might find in work-related communication. However, if the communication in question requires a formal tone, or if you think the person you’re emailing doesn’t know what lmk stands for, it might be best to avoid using it. In that case, just use the full form instead. If you do use it in formal communication, remember that consistency is key when it comes to capitalization. Consistency is also nice to see in informal communication, but it’s not as important.


I’ll go if you go, but lmk what time so I can prepare.
I think I’m coming down with something.
Lmk, I can change the reservation.
Lmk when you get the newest report.

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