let somebody know

let (one) know

To tell or inform one (of or about something). Be sure to let me know if anything changes between now and then. I let the boss know about the development yesterday.See also: know, let

let somebody ˈknow

tell somebody about something: I don’t know if I can come, but I’ll let you know soon. ♢ Let me know how I can help.See also: know, let, somebody