There are 3 definitions of who in English:

who1

Line breaks: who
Pronunciation: /huː
 
, hʊ
 
/

pronoun

1 [interrogative pronoun] What or which person or people: who is that woman? I wonder who that letter was from
More example sentences
  • You can listen to the bands, check the odds and see who you'd pick, and bet on them to win.
  • As yet we haven't been given any clues as to who can support Hounsou in the lead role.
  • If you were a London cabbie, who would you most like to have in the back of your cab?
2 [relative pronoun] Used to introduce a clause giving further information about a person or people previously mentioned: Joan Fontaine plays the mouse who married the playboy
More example sentences
  • He would be in much the same position as the farmer who previously put his cows in the field.
  • He was a good guy who kept me informed of what was going on with the other counselors.
  • At home, I sit down to reply to all the boys and girls who leave letters for me in my postbox.
2.1 archaic The person that; whoever: who holds the sea, perforce doth hold the land
More example sentences
  • Who rides at the tail of a Border thief, he sits not long at his meat.

Origin

Old English hwā, of Germanic origin; related to Dutch wie and German wer.

Usage

1 A continuing debate in English usage is the question of when to use who and when to use whom. According to formal grammar, who forms the subjective case and so should be used in subject position in a sentence, as in who decided this? The form whom, on the other hand, forms the objective case and so should be used in object position in a sentence, as in whom do you think we should support?; to whom do you wish to speak? Although there are some speakers who still use who and whom according to the rules of formal grammar as stated here, there are many more who rarely use whom at all; its use has retreated steadily and is now largely restricted to formal contexts. The normal practice in modern English is to use who instead of whom (and, where applicable, to put the preposition at the end of the sentence): who do you wish to speak to?; who do you think we should support? Such uses are today broadly accepted in standard English.2 On the use of who and that in relative clauses see that (usage).

Phrases

as who should say

archaic As if to say: he meekly bowed to him, as who should say ‘Proceed’
More example sentences
  • The Greeks called them Anticheir, as who should say, another hand.
  • One day he saw me and signed to me with his hand, as who should say, ‘What is that?’
  • All the characters and all the incidents in the play have been devised for the glorification of Cyrano, and are but, as who should say, so many rays of lime-light converging upon him alone.

who am I (or are you, is he, etc.) to do something

What right or authority do I (or you, he, etc.) have to do something: who am I to object?
More example sentences
  • Mr. Soros may not be seeking a rider on an appropriations bill, but who is he to determine the public interest?
  • But who are you to say that they wouldn't have the scars from living with a bad marriage, either?
  • But you know, who am I to advise the Catholic Church not being Catholic myself?

who goes there?

see go1.

Definition of who in:

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Word of the day ween
Pronunciation: wiːn
verb
be of the opinion; think or suppose

There are 3 definitions of who in English:

Who2

Line breaks: Who
Pronunciation: /huː
 
, hʊ
 
/
(the Who) An English rock group known almost as much for destroying their instruments on stage as for the songs of guitarist Pete Townshend (b.1945). They had hits with songs such as ‘My Generation’ (1965) and recorded Townshend’s rock opera Tommy in 1969.