declare war on (someone or something)

(redirected from Declared war)
Also found in: Legal.

declare war on (someone or something)

1. To officially announce the intention to fight against an enemy country or group in a war. We will have to declare war on the rebels if they advance over our border.
2. To announce the intention to vehemently oppose someone or something. This usage does not refer to physical fighting. The mayor has declared war on crime in our city and is bolstering our police force.
See also: declare, on, war
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

declare war on

Also, declare war against. Announce one's intent to suppress or eradicate something or someone. For example, The police have declared war on drug dealing in the neighborhood, or Several gangs have declared war against each other. This usage transfers the literal sense of the term, "to state formally one's intention to carry on hostilities against another power," to a somewhat smaller scale.
See also: declare, on, war
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.
See also:
References in classic literature ?
"No one has declared war, but people sympathize with their neighbors' sufferings and are eager to help them," said Sergey Ivanovitch.
"I have declared war against no people," he answered.
He then formally declared war against Pedro Lopez, the leader of the slave-drivers, enrolled a band of runaway slaves in his service, armed them, and conducted a campaign, which ended by his killing with his own hands the notorious half-breed and breaking down the system which he represented.
Mongolian Health Minister Davaajantsan Sarangerel on Monday declared war against the sexually transmitted disease (STD) syphilis, a growing public health concern in the East Asian country, Xinhua reported.
The NY Times has declared war on the Jews, and it is time to strike back.
I don't know that there's anything that can be done, but I think understanding that it can drive people insane is the first step" Game Of Thrones' Maisie Williams "We have declared war on our nature when we declare war on the natural world.
I don't know that there's anything that can be done, but I think understanding that it can drive people insane is the first step" "We have declared war on our nature when we declare war on the natural world.
Germany and Italy declared war on the US, while America immediately retaliated by declaring war on the Axis powers.
Newly deployed County Commander Ali Nuno has declared war against illegal possession of firearms.
In his keynote speech, Mr Corbyn "declared war" on health inequality, claiming Conservative austerity is killing people.
Filipinos never declared war. It was Spain, the United States, and Japan that declared war on us, that invaded us and did manage to subjugate us.
Speaking in the European Parliament in Strasbourg , he said "it has nothing to do with Iraq or Libya, we have not declared war on anyone and did not intervene in declaring war on anyone." "But if you believe in multilateralism, if you believe in the force of law, then at some point of time you have to decide that you cannot simply cave in to the cynicism of those who do not support multilateralism," Macron added.
In related news, the secretary general of the Lebanese resistance movement Hezbollah, Sayyed Hassan Nasrallah, said on Friday that Saudi rulers had clearly and openly declared war against Lebanon by holding the country's Prime Minister Saad Hariri hostage in Riyadh.
Hezbollah's leader said on Friday that Saudi Arabia had declared war on Lebanon and his Iran-backed group, accusing Riyadh of detaining Saad al-Hariri and forcing him to resign as Lebanon's prime minister to destabilise the country.