Meaning of long barrow

long' bar'row

Pronunciation: [key]
— Archaeol. Archaeol.
  1. a funerary barrow having an elongate shape, sometimes constructed over a megalithic chamber tomb and usually containing one or more inhumed corpses along with artifacts: primarily Neolithic but extending into the Bronze Age. Cf. round barrow.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.