Indelible In*del"i*ble, a. [L. indelebilis; pref. in- not + delebilis capable of being destroyed: cf. F. ind['e]l['e]bile. See In- not, and Deleble.] [Formerly written also indeleble, which accords with the etymology of the word.] 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. [R.] They are endued with indelible power from above. --Sprat. Indelible colors, fast colors which do not fade or tarnish by exposure. Indelible ink, an ink obliterated by washing; esp., a solution of silver nitrate. Syn: Fixed; fast; permanent; ineffaceable. -- In*del"i*ble*ness, n. -- In*del"i*bly, adv. Indelibly stamped and impressed. --J. Ellis.