let know

let know (third-person singular simple present lets know, present participle letting know, simple past and past participle let know)

1. (ditransitive) To inform (someone) (of something).

   I sent an email to let John know what we found.

   Let me know when you are arriving.

   "I'm not sure which flight I'll be taking." / "Well, as soon as you find out, let me know."

   He let her know about his plans.

   If anyone has seen him, let us know of his whereabouts.

   Let us know your decision asap.

• The second object may be omitted when it is understood in context.