Definition of let someone know
- Let me know if you're going to the party.
- Please let me know if there's anything I can do to help.
: to cause to : make
: to give opportunity to or fail to prevent
used in the imperative to introduce a request or proposal
: something that impedes : obstruction
: a shot or point in racket games that does not count and must be replayed
: hinder, prevent
: small one
: article worn on
: some person : somebody
: to perceive directly : have direct cognition of
: to have understanding of
: to recognize the nature of : discern
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