DECLARE WAR ON SOMEONE OR SOMETHING

declare war on someone or something: translation

declare war against someone or something & 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.