transitive verb evolved evolved′, evolving evolv′·ing

1. to develop by gradual changes; unfold
2. to set free or give off (gas, heat, etc.)
3. to produce or change by evolution

Etymology: L evolvere, to roll out or forth < e-, out + volvere, to roll: see walk

intransitive verb

1. to develop gradually by a process of growth and change
2. ☆ to become disclosed; unfold