v. To set apart or cut off from others.v. To place in quarantine.v. Chemistry To separate (a substance) in pure form from a combined mixture.v. To render free of external influence; insulate.v. Microbiology To separate (a pure strain) from a mixed bacterial or fungal culture.v. Psychology To separate (experiences or memories) from the emotions relating to them.v. Electricity To set apart (a component, circuit, or system) from a source of electricity.v. Electricity To insulate or shield.adj. Solitary; alone.n. A person, thing, or group that has been isolated, as by geographic, ecologic, or social barriers.n. Biology A population of bacteria or other cells that has been isolated.n. Linguistics A language isolate.