1. All space-time, matter, and energy, including the solar system, all stars and galaxies, and the contents of intergalactic space,regarded as a whole.
2. A hypothetical whole of space-time, matter, and energy that is purported to exist simultaneously with but to be different from thisuniverse: an alternate universe.
a. A model or conception of the earth and everything else that exists: "Apart from celestial beings, the aboriginals' universe contained spirits of the land and sea" (Madhusree Mukerjee).
b. The human race or a subset of it: "It was a universe that took slavery for granted" (Adam Hochschild).
4. A sphere of interest, activity, or understanding: "their almost hermetically sealed-off universe of part-time jobs and study andimprovised meals" (Sue Miller).