when
US /wen/
UK /wen/
1.
at what time or on what occasion
:
•
When did you arrive?
•
When will the meeting start?
2.
at the time that; during the time that
:
•
I was sleeping when the phone rang.
•
She smiled when she saw him.
1.
the time at which something happens
:
•
Tell me the when and where of the party.
•
The exact when of the event is still unknown.
1.
at which time (referring to a preceding noun)
:
•
There was a time when I believed in magic.
•
I remember the day when we first met.