'Tarn' definitions:

Definition of 'tarn'

From: WordNet
noun
A mountain lake (especially one formed by glaciers)

Definition of 'Tarn'

From: GCIDE
  • Tarn \Tarn\, n. [OE. terne, Icel. tj["o]rn.] A mountain lake or pool. [1913 Webster]
  • A lofty precipice in front, A silent tarn below. --Wordsworth. [1913 Webster]