A county in Leinster, Ireland, touching the Irish Sea between Louth and Dublin, is watered by the Boyne River and its tributary the Blackwater; the surface is undulating, the soil fertile; some oats and potatoes are grown, but most of the county is under pasture; there is a little linen and coarse woollen industry; the chief towns are Navan, Kells, and the county town Trim.