Meanings

Yom Kippur War

the four signs of orthodox Buddhism

land-tax rate during the Edo period (the government took 60 percent of the year's rice crop and the farmers kept 40 percent)

fourth court rank

four-letter word (esp. in English)

tetrose

Treatise on the Two Entrances and Four Practices

the four examinations (in Chinese medicine: seeing, hearing, asking, touching)

yotsugana

tetrad

three or four days

fundamental interactions

quaternion

May Fourth Movement (anti-imperialist student demonstration in Beijing on May 4, 1919)

humorism (ancient system of medicine)

four legs

the four most important tournaments in a particular sport

quadruped walking

enjoying food, drink and entertainment in a small room

four-character compound word (usu. idiomatic)