spiritual (adj.)

c. 1300, "of or concerning the spirit" (especially in religious aspects), from Old French spirituel, esperituel (12c.) or directly from a Medieval Latin ecclesiastical use of Latin spiritualis "of or pertaining to breath, breathing, wind, or air; pertaining to spirit," from spiritus "of breathing, of the spirit" (see spirit (n.)). Meaning "of or concerning the church" is attested from mid-14c. Related: Spiritually. An Old English word for "spiritual" was godcundlic.

In avibus intellige studia spiritualia, in animalibus exercitia corporalia [Richard of St. Victoror (1110-1173): "Watch birds to understand how spiritual things move, animals to understand physical motion." - E.P.]

spiritual (n.)

"African-American religious song," 1866, from spiritual (adj.). Earlier "a spiritual thing" (1660s).

Definitions of spiritual
spiritual (adj.)
concerned with sacred matters or religion or the church;
spiritual leaders
lords temporal and spiritual
spiritual songs
Synonyms: religious
spiritual (adj.)
concerned with or affecting the spirit or soul;
spiritual values
a spiritual approach to life
spiritual fulfillment
Synonyms: unearthly
spiritual (adj.)
lacking material body or form or substance; "the vital transcendental soul belonging to the spiritual realm"-Lewis Mumford;
spiritual beings
spiritual (adj.)
resembling or characteristic of a phantom;
spiritual tappings at a seance
Synonyms: apparitional / ghostlike / ghostly / phantasmal / spectral
spiritual (n.)
a kind of religious song originated by Blacks in the southern United States;
Synonyms: Negro spiritual