noun
Refers specifically to the western part of Europe, often contrasted with 東欧 (Eastern Europe).
See also: 東欧
西欧諸国はEUの中心的なメンバーです。
Western European countries are central members of the EU.
noun
Broader cultural and geopolitical sense, often used in contrast to 東洋 (the East) or 日本. Can encompass Europe as a whole or Western civilization.
西欧の文化は日本に大きな影響を与えた。
Western culture has had a great influence on Japan.