declare war(redirected from Declaring war)
Also found in: Legal.
1. To officially announce the intention to fight against an enemy country or group in a war. We will have to declare war if the rebels 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.
1. To state formally the intention to carry on armed hostilities against.
2. To state one's intent to suppress or eradicate: declared war on drug dealing in the neighborhood.