Eyre \Eyre\ ([^a]r), n. [OF. erre journey, march, way, fr. L. iter, itineris, a going, way, fr. the root of ire to go. Cf. Errant, Itinerant, Issue.]

(O. Eng. Law) A journey in circuit of certain judges called justices in eyre (or in itinere).

Note: They were itinerant judges, who rode the circuit, holding courts in the different counties.

Source: Webster's Revised Unabridged Dictionary (1913)