When | Mean of when in English Dictionary

/ˈwɛn/

• at what time
1. When will you return?
2. When did the American Civil War begin?
3. The detective asked me when I last saw her.
4. When is the next performance?
5. (Do you) remember when that happened?
• at, in, or during which
1. It was a time when people didn't have to lock their doors.
2. the happy days when we were together
• at or during which time
1. We're still waiting for the test results, when we'll decide our next move.

• at a former and usually less successful time
1. I can say I knew you when. [=I knew you before you were famous or successful]
• at or during the time that
1. We went fishing when [=while] we were on vacation.
2. I'll leave when you do. [=I'll leave at the same time as you]
3. When he finally showed up, he was drunk.
4. When I was in school, we didn't have computers.
• just after the time that
1. You can go when the bell rings.
2. Call me when you get home.
3. Things were better when he got a job.
• at any or every time that
1. I cry when [=whenever] I hear that song.
2. When he watches television, he falls asleep.
• in spite of the fact that
1. She quit politics when she might have had a great career in it.
• the time or occasion at or in which
1. Tomorrow is when we must decide.
• what or which time
1. He retired in 1998, since when he has been devoting his time to gardening.
2. You need the report by when?