permanent

(noun) a series of waves in the hair made by applying heat and chemicals. Synonyms: permanent wave, perm.

(adj) continuing or enduring without marked change in status or condition or place. Synonyms: permanent (vs. impermanent), lasting. Examples: "Permanent secretary to the president." "Permanent address." "Literature of permanent value."

(adj) not capable of being reversed or returned to the original condition. Example: "Permanent brain damage."