—v.t. 1. to develop gradually: to evolve a scheme. 2. to give off or emit, as odors or vapors.
—v.i. 1. to come forth gradually into being; develop; undergo evolution: The whole idea evolved from a casual remark. 2. Biol.to develop by a process of evolution to a different adaptive state or condition: The human species evolved from an ancestor that was probably arboreal.