WHEN — Definition of WHEN
noun
1
The time at which something happens.
A good article will cover the who, the what, the when, the where, the why and the how.
adverb
1
(interrogative) At what time? At which time? Upon which occasion or circumstance? Used to introduce direct or indirect questions about time.
Do you know when they arrived?
2
At an earlier time and under different, usually less favorable, circumstances.
He's mister high and mighty now, but I remember him when.
3
(relative) At which, on which, during which: often omitted or replaced with that.
That was the day when the Twin Towers fell.
pronoun
1
(interrogative) What time; which time.
Since when do I need your permission?
2
The time that.
I recall when they were called the Greys.
conjunction
1
At (or as soon as) that time that; at the (or any and every) time that; if.
A player wins when [as soon as, or at any time that, if] she has four cards of the same suit.
2
During the time that; at the time of the action of the following clause or participle phrase.
Be careful when crossing the street.
3
At what time; at which time.
I am here till Friday, when [i.e. at which time] I leave for Senegal.
4
Since; given the fact that; considering that.
I don't see the point of putting up Christmas decorations when I am the only person who is going to see them.
interjection
1
That's enough, a command to stop adding something, especially an ingredient of food or drink.
2
Expressing impatience. (Compare what.)
📚 Source: en.wiktionary.org/wiki/when
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