1. of the same substance or essence; sharing the same fundamental nature or being
Usage: formal; chiefly theological or philosophical
2. united or connected in substance; essentially the same
Usage: formal; rare in modern usage

Examples

• In Christian theology, the Father and Son are described as consubstantial, sharing one divine substance.
• The council affirmed that Christ was consubstantial with God the Father.
• Philosophers debated whether mind and body could be consubstantial.
• The two principles were held to be consubstantial by medieval scholars.
• Early church doctrine established the consubstantial nature of the Trinity.