“LMK” stands for “Let Me Know.” It’s a commonly used acronym in text messaging and online communication to indicate that you’re asking someone to inform you about something or provide you with information.

Here’s how you can use “LMK” in a sentence:

1. Direct Request:
   • “Hey, if you’re free this weekend, LMK. We could grab coffee or catch a movie.”
2. Asking for Information:
   • “I’m not sure about the details of the event. Could you find out and LMK?”
3. Offering an Invitation:
   • “I’m planning a get-together at my place next Friday. If you’re interested, LMK and I’ll send you the details.”
4. Seeking Input:
   • “I’m deciding on a restaurant for dinner tonight. If you have any preferences, LMK.”
5. Checking Availability:
   • “I’m thinking of organizing a hiking trip next month. If it sounds interesting, LMK if you’re available.”

In general, “LMK” is a friendly way to ask someone to share information with you. It’s often used in casual conversations, and its purpose is to prompt the other person to provide the relevant information or express their interest or availability.