noun
the Occident and the Orient; East and West
Used in formal or historical contexts to refer to the Western and Eastern worlds together, often with emphasis on the West. Common in set phrases like 洋の東西.
洋の東西を問わず、この思想は広まっている。
This idea has spread regardless of East or West.
noun
Literary or poetic term for the ocean. Not used in everyday conversation; modern Japanese prefers 海.
彼は広大な洋に船出した。
He set sail on the vast ocean.
prefix
Prefix used in compounds to indicate Western or foreign origin, as in 洋食 (Western-style food), 洋服 (Western clothing), 洋楽 (Western music).
洋食と和食、どちらが好きですか。
Which do you prefer, Western food or Japanese food?