The Collaborative International Dictionary
Lighthouses
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.
Wiktionary
lighthouses
n. (plural of lighthouse English)