Organized, large-scale, armed conflict between countries or between national, ethnic, or other sizeable groups, usually but not always involving active engagement of military forces

• I did not go to the war.

  Tatoeba · Aghanim · CC BY 2.0 FR

• I don't want my children go to war.

  Tatoeba · Aghanim · CC BY 2.0 FR

A particular conflict of this kind

Protracted armed conflict against irregular forces, particularly groups considered terrorists

Protracted state or state-sponsored political violence against dissidents

Any protracted conflict, particularlyrare

Any protracted conflict, particularly; A sustained campaign against a social problem, idea, set of values, etcrare

Any protracted conflict, particularly; A protracted instance of fierce competition in traderare

Any protracted conflict, particularly; A protracted struggle between rival organizations for control of a particular institutionrare

Any protracted conflict, particularly; A prolonged conflict between two groups of organized criminals, usually over organizational or territorial controlrare

Any protracted conflict, particularly; An argument between two or more people with opposing opinions on a topic or issuerare

To engage in conflict (may be followed by "with" to specify the foe)

To carry on, as a contest; to wage