'Drumlin' definitions:

Definition of 'drumlin'

(from WordNet)
noun
A mound of glacial drift

Definition of 'Drumlin'

From: GCIDE
  • Drumlin \Drum"lin\, n. [Gael. druim the ridge of a hill.] (Geol.) A hill of compact, unstratified, glacial drift or till, usually elongate or oval, with the larger axis parallel to the former local glacial motion. [1913 Webster]