WAR - [noun] a period of conflict and fighting between countries or nations
Examples of use
His father left the country when it was at war, whereas his friends were fighting with the enemy and dying.
Some people are afraid that the global economic crisis may result in the 3rd World War.
Learn more English words
English speaking practise
Remember that if you don't use that word in English conversations or writing you'll forget it in a short time. So the best thing you can do to learn this word is just trying to use it in speaking or writing. Remember also that practise is the key to fluent english speaking.
You can always find a partner, who would also like to improve his/her