1. To state reasons in opposition to something. My uncle is an ardent liberal and argues against my mother's conservative beliefs every time they're together.
2. To serve as evidence in opposition to something. Hinton's novel argues against a simplistic understanding of teenage life in the 1960s.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
argue against someone or something
1. Lit. [for someone] to make a case against someone or something; to oppose the choice of someone or something in an argument. I am preparing myself to argue against the case. Liz argued against Tom as the new president, but we chose him anyway.
2. Fig. [for something, such as facts] to support a case against someone or something in an argument; [for something, such as facts] to support a case against the choice of someone or something in an argument. I have uncovered something that argues against continuing this friendship. His own remarks argue against his qualifications for the office, but he probably will be elected anyway.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
1. To present reasons opposing something; make a case against something: In my history paper, I argued against the idea that we could have won the war.
2. To act as evidence against something: There are some new scientific discoveries that argue against earlier ideas about the growth of cells.
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.