- making marks that cannot be erased, removed, or the like: indelible ink.
- that cannot be eliminated, forgotten, changed, or the like: the indelible memories of war; the indelible influence of a great teacher.
- incapable of being erased or obliterated
- making indelible marksindelible ink
1520s, from Latin indelebilis “indelible, imperishable,” from in- “not, opposite of, without” (see in- (1)) + delebilis “able to be destroyed,” from delere “destroy, blot out” (see delete). Vowel change from -e- to -i- in English is late 17c. Related: Indelibly.