1.
ocean; great ocean
A vast body of salt water, one of the major divisions of the world's oceans.
大洋を渡る。
To cross the ocean.
世界には五つの大洋がある。
There are five oceans in the world.
大洋の真ん中で嵐に遭った。
We encountered a storm in the middle of the ocean.
大洋 refers specifically to the great oceans of the world — the largest bodies of water. It is more formal and specific than 海.
THE FIVE OCEANS:
- 太平洋: Pacific Ocean
- 大西洋: Atlantic Ocean
- インド洋: Indian Ocean
- 北極海: Arctic Ocean
- 南極海: Southern/Antarctic Ocean
SIMILAR WORDS:
- 海: sea, ocean (everyday, general)
- 海洋: ocean (scientific, formal, often in compounds)
- 洋: ocean (used in compound names like 太平洋)
NOTE:
Homophone with 太陽 (sun). Context usually makes the meaning clear, but be aware of the distinction in listening.