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Related to defend: defend against
defend (oneself or someone) with (something)
To use something to protect (someone or something) against a physical attack. When John realized that a burglar was in the house, he tried to defend himself with a baseball bat.
defend (someone or something) against (someone or something)
1. To protect (someone or something) against a physical attack. We will most certainly defend this castle against any invaders, my liege.
2. To argue in favor of someone or something in the face of opposition. How do you plan to defend him against such incriminating evidence?
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
defend someone or something against someone or something
1. to stand against an attack; to provide a defense against attack. Don't worry, I will defend you against any muggers. We defended ourselves against the attack. The army defended the town against the enemy soldiers.
2. . to advocate the cause of someone or something against someone or something else. The lawyer defended her against the plaintiff. She defended the company against the suit.
defend someone with something
to repel danger from someone with something. Here, defend yourself with this club. Mary defended herself with karate.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.