Places in Middle-earth
Type: Buildings, Halls, Houses
Meaning: Hall of Feasts
In three days..., Éomer of Rohan came riding to the City, and with him came an éored of the fairest knights of the Mark. He was welcomed; and... they sat all at table in Merethrond, the Great Hall of Feasts....
The Return of the King, LoTR Book 6, Ch 5, Many Partings
mereth(a) 'feast' in Mereth Aderthad; also in Merethrond, the Hall of Feasts in Minas Tirith....
rond meant a vaulted or arched roof, or a large hall or chamber so roofed; so Nargothrond..., Hadhodrond, Aglarond. It could be applied to the heavens, hence the name Elrond 'star-dome'.
The Silmarillion, Appendix: Elements in Quenya and Sindarin Names
Contributors: Elena Tiriel 6Feb10