Noah Webster's Dictionary 1. (a.) Not thinking; not heedful; thoughtless; inconsiderate; as, unthinking youth. 2. (a.) Not indicating thought or reflection; thoughtless.

Multi-Version Concordance Unthinking (2 Occurrences) Luke 11:40 unthinking! did not He who made the outside also the inside make? (YLT) Luke 12:20 And God said to him, Unthinking one! this night thy soul they shall require from thee, and what things thou didst prepare -- to whom shall they be? (YLT)