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]