(originally Reul), an ancient market-town and municipal burgh, county Meath, Ireland. It is pleasantly situated on the Blackwater, 36 miles N.W. of Dublin, but is, for the most part, meanly built and dirty. Amongst the antiquities of the town and neighbourhood are the old church, a round tower 99 feet high, a richly carved cross, and some remains of a monastery, said to have been founded by Columba in 550. In the neighbourhood is the seat of the Marquis of Headfort. Pop. 3997.