A war is a period of fighting or conflict between countries or states.

War is intense economic competition between countries or organizations.

If you make war on someone or something that you are opposed to, you do things to stop them succeeding.

If someone has been in the wars, they have been injured, for example in a fight or in an accident.

If a country goes to war, it starts fighting a war.

If two people, countries, or organizations have a war of words, they criticize each other because they strongly disagree about something.