It is clear, evident, or established (used in formal declarations or legal documents); a statement asserting something as established fact.
From Latin constat, third person singular present of constare 'to be evident, stand together clearly,' from con- + stare 'to stand.' Used in Medieval Latin legal formulas.
Constat appears in legal documents as 'constat that...' meaning 'it is evident that'—lawyers borrowed Latin phrases because Latin gave legal writing the gravitas and precision of an ancient imperial language.
Complete word intelligence in one call. Free tier — 50 lookups/day.