圏けん

suffix

sphere; circle; range; area; zone; bloc

Productive suffix that attaches to nouns to form words meaning a bounded domain, sphere of influence, or geographical/cultural zone. Common in compounds like 経済圏 (economic bloc), 首都圏 (metropolitan area), and 勢力圏 (sphere of influence).

• 東とう京きょうは首しゅ都と圏けんの中ちゅう心しんです。

  Tokyo is the center of the metropolitan area.

• この地ち域いきは経けい済ざい圏けんとして発はっ展てんしている。

  This region is developing as an economic bloc.

noun

category

Technical mathematical term for a category in the sense of category theory. Rare outside specialized contexts.

• 数すう学がくの圏けん論ろんでは、圏けんは対たい象しょうと射しゃからなる。

  In category theory, a category consists of objects and morphisms.