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1. In great detail. I studied American modernism in college, so I can speak about Eliot's poetry at length.
2. For a long period of time. My father always lectures me at length about the dangers of living in the city.
3. Finally. At length, the sermon ended.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
1. after some time; finally. At length, the roses bloomed, and the tomatoes ripened. And at length, the wizard spoke.
2. and at some length for quite a long time. He spoke to us about the problem at some length. He described the history of his village at length.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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.
1 (literary) after a long time: ‘I’m not sure,’ he said at length.
2 in great detail and taking a long time: She talked at length about her work in hospitals.
Farlex Partner Idioms Dictionary © Farlex 2017
1. After some time; eventually: At length we arrived at our destination.
2. For a considerable time; fully: spoke at length about the court ruling.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.