1. That can not be removed, washed away, blotted out, or effaced; incapable of being canceled, lost, or forgotten; as, indelible characters; an indelible stain; an indelible impression on the memory.
2. That can not be annulled; indestructible. They are endued with indelible power from above. (Sprat) indelible colours, fast colours which do not fade or tarnish by exposure. Indelible ink, an ink obliterated by washing; especially, a solution of silver nitrate.
Synonym: fixed, fast, permanent, ineffaceable.
Indelibleness, Indelibly, Indelibly stamped and impressed. (j. Ellis)
Origin: L. Indelebilis; pref.in- not – delebilis capable of being destroyed: cf. F. Indelebile. See In- not, and Deleble Formerly written also indeleble, which accords with the etymology of the word.