To unfold; open and expand.To unfold or develop by a process of natural, consecutive, or logical growth from, or as if from, a germ, latent state, or plan.To unfold by elaboration; work out; bring forth or make manifest by action of any kind: as, to evolve a drama from an anecdote; to evolve the truth from a mass of confused evidence; to evolve bad odors by stirring a muck-heap.To open or disclose itself; become developed.In chem., geol., etc., to give off or make manifest by separation from a mixture or a compound: most commonly used of a gas or vapor: as hydrochloric-acid gas evolved from a mixture of common salt and sulphuric acid.In mathematics, to extract (roots).