'Culvert' definitions:

Definition of 'culvert'

From: WordNet
noun
A transverse and totally enclosed drain under a road or railway

Definition of 'Culvert'

From: GCIDE
  • Culvert \Cul"vert\ (k?l"v?rt), n. [Prob. from OF. coulouere, F. couloir, channel, gutter, gallery, fr. couler to flow. See Cullis.] A transverse drain or waterway of masonry under a road, railroad, canal, etc.; a small bridge. [1913 Webster]

Synonyms of 'culvert'

From: Moby Thesaurus