to whom it may concern
Used as a formal salutation in a letter when the writer does not know the recipient or the identity of the recipient.
pron
What person or people; which person or people.
Whom did you ask?
“Oh?” she said. “So you have decided to revise my guest list for me? You have the nerve, the – the –” I saw she needed helping out. “Audacity,” I said, throwing her the line. “The audacity to dictate to me who I shall have in my house.” It should have been “whom”, but I let it go. “You have the –” “Crust.” “– the immortal rind,” she amended, and I had to admit it was stronger, “to tell me whom” – she got it right that time – “I may entertain at Brinkley Court and who” – wrong again – “I may not.”
What person or people; which person or people.
To whom are you referring?
With whom were you talking?
Used to refer to a previously mentioned person or people.
That is the woman whom I spoke to earlier. (defining)
Mr Smith, whom we all know well, will be giving the speech. (non-defining)
The person(s) whom; whomever.
To whom it may concern, all business of John Smith Ltd. has now been transferred to Floggitt & Runne.
Also used with names of collective nouns that are groups of people, especially singularly-named musical groups or sports teams.
Whom was Lemmy bassist for? Motörhead!
pron
Honorific alternative letter-case form of whom, sometimes used when referring to God or another important figure who is understood from context.