Things related to the needs of the physical body rather than the spiritual body. 2. Of the flesh and physical world as in a desire for food, sexual gratification and material possessions.Carnal is frequently used to describe sexual relations only e.g. carnal proclivities and carnal knowledge.hings related to the needs of the physical body rather than the spiritual body. 2. Of the flesh and physical world as in a desire for food, sexual gratification and material possessions.