B2[T]to announce something clearly, firmly, publicly, or officially: They declared their support for the proposal[+ (that)]She declared (that) it was the best chocolate cake she had ever tasted.[+ obj + (to be)+ noun/adj]They declared themselves (to be) bankrupt.[+ speech]"I won't do it!" he declared.America declared waron Japan in 1941 (= announced officially that it was at war).figurativeThe government have declared waron(= announced that thaey intended to stop) the drug dealers.The country declared independence in 1952 (= announced that it was no longer under the control of another country).Announcing, informing and statingB1[T]to officially tell someone the value of goods you have bought, or the amount of money you have earned because you might have to pay tax: Nothing to declare.Goods to declare.You have to declare any earnings over a certain amount.Announcing, informing and stating