What is Cantred?

Legal Definition
A cantred was a subdivision of a county in the Anglo-Norman Lordship of Ireland between the 13th and 15th centuries, analogous to the cantref of Wales or the hundred of England. In County Dublin the equivalent unit was termed a serjeanty, while in County Meath and environs it was a barony. The area of a cantred usually corresponded to that of an earlier trícha cét of Gaelic Ireland, and sometimes to that of a rural deanery in the medieval Irish church. Paul Mac Cotter has "demonstrated the existence of 151 certain cantreds and indicated the probable existence of a further 34." Cantreds were replaced by baronies from the 16th century.
-- Wikipedia
Legal Definition
A district comprising a hundred villages; a hundred. A term used in Wales in the same sense as "hundred" is in England. Cowell; Termes de la Ley.
-- Black's Law Dictionary
Legal Definition
(Welsh) A district; a hundred.
-- Ballentine's Law Dictionary