noun
plural wars
a state or period of fighting between countries or groups [count]
a situation in which people or groups compete with or fight against each other [count]
[count] :an organized effort by a government or other large organization to stop or defeat something that is viewed as dangerous or bad
all's fair in love and war
declare war
this means war
used to show you are offended by what someone has said or done and want to start a fight with that person
war of nerves
war of words