ax(noun, verb) noun1. an edge tool with a heavy bladed head mounted across a handleSimilar word(s): axeDefinition categories: man–made verb1. chop or split with an ax- axe woodSimilar word(s): axeDefinition categories: contact, chop, hack2. terminate- The NSF axed the research program and stopped funding itSimilar word(s): axeDefinition categories: change, end, terminate