Main Entry:

¹caulk

Variant(s):

or calk \ˈkȯk\

Function:

transitive verb

Etymology:

Middle English caulken, from Anglo-French cauker, calcher, chalcher to trample, from Latin calcare, from calc-, calx heel

Date:

15th century

: to stop up and make tight against leakage (as a boat or its seams, the cracks in a window frame, or the joints of a pipe)

— caulk·er noun