Unconverted men are so called (1 Corinthians 3:3). They are represented as of a "carnal mind, which is enmity against God" (Romans 8:6,7). Enjoyments that minister to the wants and desires of man's animal nature are so called (Romans 15:27; 1 Corinthians 9:11). The ceremonial of the Mosaic law is spoken of as "carnal," because it related to things outward, the bodies of men and of animals, and the purification of the flesh (Hebrews 7:16; 9:10). The weapons of Christian warfare are "not carnal", that is, they are not of man's device, nor are wielded by human power (2 Corinthians 10:4).
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain, copy freely.
Easton, Matthew George. "Entry for 'Carnal'". "Easton's Bible Dictionary".