1.A judge (of whom there are two) in the Isle of Man judiciary.
‘Illiam Dhone’s sons, George and Ewan, presented petitions for redress, and, after some delay, the earl, the deemsters, and three other members of ‘the pretended court of justice’ were brought before the King in Council.’
‘The bishop was entitled to appoint to all livings lapsed for 6 months (although in 1541 the deemsters had ruled that the Lord of the Isle should control such appointments).’