noun

• (nautical) A tool used to moor a vessel to the bottom of a sea or river to resist movement.
  "Men that I knew around Wapatomac didn't wear high, shiny plug hats, nor yeller spring overcoats, nor carry canes with ivory heads as big as a catboat's anchor, as you might say."
• (nautical) An iron device so shaped as to grip the bottom and hold a vessel at her berth by the chain or rope attached. (FM 55-501).
• (nautical) The combined anchoring gear (anchor, rode, bill/peak and fittings such as bitts, cat, and windlass.)
• (heraldry) Representation of the nautical tool, used as a heraldic charge.

noun

• (obsolete) An anchorite or anchoress.
  "Nor earth to me giue foode, nor heauen light, / Sport and repoſe lock from me day and night, / To deſperation turn my truſt and hope, / And Anchors cheere in priſon be my ſcope, […]"