in that

in that idiom
For the reason that, because, as in In that you will be busy for the next few weeks, let's go over your paper now. [Mid-1400s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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