Merriam-Webster Collegiate Dictionary - spiritual

 I. adjective  Etymology: Middle English, from Anglo-French & Late Latin; Anglo-French espirital, ~, from Late Latin ~is, from Latin, of breathing, of wind, from spiritus  Date: 14th century  1. of, relating to, consisting of, or affecting the spirit ; incorporeal ~ needs  2.  a. of or relating to sacred matters ~ songs  b. ecclesiastical rather than lay or temporal ~ authority lords ~  3. concerned with religious values  4. related or joined in spirit our ~ home his ~ heir  5.  a. of or relating to supernatural beings or phenomena  b. of, relating to, or involving ~ism ; ~istic  • ~ly adverb  • ~ness noun  II. noun  Date: 1582  1. plural things of a ~, ecclesiastical, or religious nature  2. a religious song usually of a deeply emotional character that was developed especially among blacks in the southern United States  3. capitalized any of a party of 13th and 14th century Franciscans advocating strict observance of a rule of poverty for their order