adj. 1. Impossible to remove, erase, or wash away; permanent: indelible ink. 2. Making a mark not easily erased or washed away: an indelible pen for labeling clothing. 3. Unable to be forgotten; memorable: an indelible memory. [Alteration of earlier indeleble, from Latin indēlēbilis : in-, not; see IN-1 + dēlēbilis, capable of being effaced (from dēlēre, to wipe out).] in·del′i·bili·ty n. in·deli·bly adv. |
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