Tried, proved by experience. In early use often (after Latin) as mere participle. Obsolete.

= determined, adj. Obsolete or archaic.

Proved or tested by experience or examination.

Proved or established by experience, tried, tested.

Of a remedy: Proved or tried by experiment or experience; approved. Of a fact, etc.: Known by experience or experiment; ascertained, authenticated…

Certified, assured.

Of remedies, etc.: Tested, tried, approved.

Certified, verified, certain, sure.

Made certain; assured; certainly informed; attested by certificate; furnished with a certificate.

Allowed by law or authority; approved, justified, sanctioned.

Definitely ascertained or identified.