calk(noun, verb) noun1. a metal cleat on the bottom front of a horseshoe to prevent slippingSimilar word(s): calkinDefinition categories: man–made, cleat verb1. provide with calks- calk horse shoesDefinition categories: contact, furnish, provide, render, supply2. seal with caulkingSimilar word(s): caulkDefinition categories: contact, seal3. injure with a calkDefinition categories: body, injure, wound