declare war against (someone or something)

(redirected from declared war against them)

declare war against (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 against 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, war

declare war against someone or something

 and declare war on someone or something 
1. Lit. to formally announce that one will fight a war with someone or some country. A group of countries declared war against the aggressor.
2. . Fig. to announce a serious campaign against a type of person or a serious problem. The president declared war against crime and criminals. The pressure group declared war on waste.
See also: declare, war
References in periodicals archive ?
He described those who engaged in the nefarious act as economic saboteurs, saying that the command had declared war against them.
The time when the USA waited for two years or so to see where the wind blew before they decided whether to join in, and then did so only after Pearl Harbour when the Germans declared war against them.