The earth. The universe. The earth with its inhabitants. The inhabitants of the earth; the human race. Humankind considered as social beings; human society: turned her back on the world. People as a whole; the public: The event amazed the world. A specified part of the earth: the Western World. A part of the earth and its inhabitants as known at a given period in history: the ancient world. A realm or domain: the animal world; the world of imagination. A sphere of human activity or interest: the world of sports. A class or group of people with common characteristics or pursuits: the scientific world. A particular way of life: the world of the homeless. All that relates to or affects the life of a person: He saw his world collapse about him. Secular life and its concerns: a man of the world. Human existence; life: brought a child into the world. A state of existence: the next world. A large amount; much. Often used in the plural: did her a world of good; candidates that are worlds apart on foreign policy. A celestial body such as a planet: the possibility of life on other worlds. Of or relating to the world: a world champion. Involving or extending throughout the entire world: a world crisis. for all the world In all respects; precisely: She looked for all the world like a movie star. in the world Used as an intensive: How in the world did they manage? I never in the world would have guessed. out of this world Informal Extraordinary; superb: The dinner was out of this world. the world over Throughout the world: known the world over. world without end Forever.