'Lighthouse' definitions:

Definition of 'lighthouse'

From: WordNet
noun
A tower with a light that gives warning of shoals to passing ships [syn: beacon, lighthouse, beacon light, pharos]

Definition of 'Lighthouse'

From: GCIDE
  • Lighthouse \Light"house`\ (l[imac]t"hous`), n.; pl. Lighthouses (l[imac]t"houz`[e^]z). A tower or other building with a powerful light at top, erected at the entrance of a port, or at some important point on a coast, to serve as a guide to mariners at night; a pharos. [1913 Webster]

Synonyms of 'lighthouse'

From: Moby Thesaurus