1. Relating to hypostasis, or substance; hence, constitutive, or elementary. The grand doctrine of the chymists, touching their three hypostatical principles. (Boyle)
2. Personal, or distinctly personal; relating to the divine hypostases, or substances.
3. (Science: medicine) Depending upon, or due to, deposition or setting; as, hypostatic cognestion, cognestion due to setting of blood by gravitation. Hypostatic union, the union of the divine with the human nature of christ.
Origin: gr., cf. F. Hypostatique.