abbreviation
LMK
el-em-KAY
LMK (abbreviation) means Let me know: used at the end of a message to ask someone to reply with an answer or a decision. Example: “I've booked the table for eight — lmk if that works.”
abbreviation
1
informal Let me know: used at the end of a message to ask someone to reply with an answer or a decision.
"I've booked the table for eight — lmk if that works."
"Sending the draft over now, lmk what you think."
How to use LMK
Learner’s notesIn plain EnglishShort for "let me know".
When to use it
Informal; standard in texting and chat apps, out of place in formal correspondence.
Memory tip
Usually followed by "if", "when" or "what", exactly as the full phrase would be.
Trace the full origin ↓
Common pairings
lmk if you can make it
lmk what you think
lmk when you're free
just lmk
Vocabulary Flow
Build your vocabulary from words like LMK.
Vocabulary Flow serves the next word, and the next — meaning, pronunciation and an example each time. Practice at your level, or learn English in your own language.
Start vocabulary practice
Fill the gap
Can you complete this real example?
I've booked the table for eight — _____ if that works.
Etymology
An initialism of "let me know".
Synonyms
View more →
let me know
tell me
keep me posted
Related words
Frequently asked questions
What does LMK mean in a text?
It means "let me know". The sender is asking you to get back to them with a decision, an answer or an update, usually about something they have just proposed.
Is LMK rude?
No, it is simply casual. It is a normal sign-off in texts and instant messages between friends and, in many workplaces, between colleagues. In a formal email, write "let me know" or "please let me know" in full.
What is the difference between LMK and TBH?
They do different jobs. LMK asks for a reply. TBH means "to be honest" and introduces a frank opinion. LMK typically closes a message; TBH usually opens a statement.
What is the meaning of LMK?
"LMK" (abbreviation) means let me know: used at the end of a message to ask someone to reply with an answer or a decision.
