during which time

during Preposition

— If you do something during something else, you do it at the same time. — He often reads during dinner. — I'm always tired because I work during the night.

which Determinative

— You use which to ask for the selection of one or more members of some set. There are a lot of new books this year. Which ones do you like? Excuse me, which way is the toilet? Which of the two wines is cheaper? Which of the following cheeses are usually made from sheep's milk? A. pecorino B. vaccino C. provolone D. chevre. — You use which to add a clause to explain what thing you're talking about. For several seconds he sat in silence, during which time the tea and sandwiches arrived. I'm thinking of getting a new car, in which case I'd get a red one.

which Pronoun

— You use which to add a clause to give more information about the thing you're talking about. We've met some problems which are very difficult to handle. He walked by a door with a sign which reads: PRIVATE OFFICE. He had to leave, which was very difficult. We have to protect the environment in which we live. No art can be properly understood apart from the culture of which it is a part.

time Noun

— Time is what we measure with a clock. "What time do you finish work?" "At four o'clock (4:00)." I don't have time to talk to you right now. Can we do it later? — If you do something one time, you do it once.

time Verb

— If you time something, you measure how long it takes in seconds, minutes, hours, etc. Take out your watch and time yourself during the test.