The World, Society, The Universe
noun
Both kanji mean world, so it should be easy to guess this is a word for the World. It also means society or the Universe.
せかい
This is a jukugo word, which usually means on'yomi readings from the kanji. You know the on'yomi reading for 界, but you didn't learn this on'yomi reading of 世, so here's a mnemonic to help you remember: What's the most hated vegetable in the world? Celery (せ), probably. The world is divided into those who love celery and those who hate celery. Which one are you?
世界は広いから、色々な国に行きたいです。
The world is big, so I want to go to various countries.
このドキュメンタリーは全世界で人気の大作になりました。
This documentary has become a popular masterpiece worldwide.
アーティストは、自分の世界を持ってる人が多いです。
Many artists have a world of their own.