Definition of "squalid"

squalid¹

/ˈskwɒlɪd/

adjective
comparative squalider, superlative squalidest
1. Extremely dirty and unpleasant.
  Quotations
  [...] Mythologists describe Pan the son of Mercury (who was the God of Speech) with the upper part like a man, and the lower like a beast, to signifie that Truth is fair and comely, but a Lye squalid and Deformed.
  1686, The Refin'd Courtier, or a Correction of several indecencies crept into civil conversation., London: Matthew Gilliflower
2. Showing a contemptible lack of moral standards.

squalid²

noun
plural squalids
1. (zoology) Any member of the family Squalidae of dogfish sharks.
  Quotations
  Numerous diet studies on squalids have shown that members of this family tend to feed mainly on teleosts and cephalopods […]
  2008, David A. Ebert, James A. Sulikowski, Biology of Skates, page 126