What is the meaning of Cairn?

A rounded or conical heap of stones erected by early inhabitants of the British Isles, apparently as a sepulchral monument.

A pile of stones heaped up as a landmark, to guide travelers on land or at sea, or to arrest attention, as in surveying, or in leaving traces of an exploring party, etc.

A cairn terrier.

cairn

inflection of carn:

  1. vocative/genitive singular
  2. nominative/dative plural

vocative/genitive singular

nominative/dative plural

Source: wiktionary.org