nonreadable: Meaning and Definition of

non•read•a•ble

Pronunciation: (non-rē'du-bul), [key]
— adj.
  1. unreadable.
  2. pertaining to letter mail with addresses and zip codes incapable of being read by optical scanning devices.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.