notarial UK /nəʊˈtɛːɹɪəl/US /noʊˈtɛɹi.əl/ adjective2 •Pertaining to a notary or notaries.There were outspoken attacks on the free field in law from 1797 onwards, and lawyers were reintroduced in 1800, as was a state system of notarial certification in 1803. — 2002 •Written or executed by a notary.