at length

at length idiom
  1. In full, extensively. For example, The preacher went on at length about sin, or I have read at length about these cameras. [c. 1500]
  2. After a long time, finally, as in At length the procession ended. [Early 1500s] Also see in the long run.

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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