best evidence (s.v. "best evidence rule"): The rule of evidence that the best evidence of which the case in its nature is susceptible and which is within the power of the party to produce, or is capable of being produced, must be adduced in proof of every disputed fact. (†912)
good faith (s.v. "good faith"): n. ~ 1. Fairness and equity. The antithesis of fraud and deceit. Acting in the absence of circumstances placing a man of ordinary prudence on inquiry. – 2. Acting with a sincere belief that the accomplishment intended is not unlawful or harmful to another. – 3. Acting in the belief that a prudent and sensible man would hold in the ordinary conduct of his own business affairs. – 4. Absence of improper motive and of a negligent disregard of the rights of others. – 5. Acting without culpable negligence or a willful disregard of the rights of others and in the honest and reasonable belief that the act is rightful. [Notes omitted.] (†768)
trust : Law, Finance · 1. Noun: A fiduciary relationship; a matter of confidence.
– 2. The word is often employed in law, as well as in popular language, in a sense which is much broader than its ordinary technical significance, as denoting or as synonymous with confidence, fiduciary relationship, etc., and it is often used in reference to the confidential aspect of any kind of a bailment or possession by one person of the property of another. In its literal significance the word "trust" implies nurturing and sheltering of a sacred confidence. In its more technical significance, the word still implies such confidence in a relationship which involves a trustee, beneficiary, and a res. (†311)