let (one) know

let (one) know

To tell or inform someone (of or about something). Julie 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 someone know (about something)

to tell someone something; to inform someone of something. Please let me know about it soon. Will you be coming to the picnic? Please let me know.
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