True; trustworthy; faithful; that may be implicitly confided in: applied to persons: as, a trusty servant.Not liable to fail; that may be relied upon, as in an emergency; strong; firm: applied to things: as, a trusty sword.Trusting; trustful.Involving trust and responsibility.n. A trusty person; specifically, a well-behaved and trustworthy convict to whom special privileges are granted.