world (Noun) — Everything that exists anywhere. ex. "they study the evolution of the world"
world (Noun) — People in general; especially a distinctive group of people with some shared interest. ex. "the Western world"
world (Noun) — All of your experiences that determine how things appear to you. ex. "his world was shattered" ex. "we live in different worlds"
world (Noun) — The 3rd planet from the sun; the planet we live on. ex. "he sailed around the world"
world (Noun) — People in general considered as a whole. ex. "he is a hero in the eyes of the world"
world (Noun) — A part of the earth that can be considered separately. ex. "the outdoor world" ex. "the world of insects"
world (Noun) — The concerns of this life as distinguished from heaven and the afterlife. ex. "they consider the church to be independent of the world"
world (Noun) — All of the living human inhabitants of the earth. ex. "all the world loves a lover"
world (Adjective) — Involving the entire earth; not limited or provincial in scope. ex. "a world crisis" ex. "world-wide war"