Rowlock/ˈrɑːlək,ˈrəʊlɑːk/ Definition 1 of 1Pro Tip 1/3Nautical Term Rowlock is a technical term used in boating and rowing. During the rowing lesson, the instructor explained how the rowlock works. Pro Tip 2/3Context Importance Understanding 'rowlock' requires familiarity with boat parts and rowing. The novice rower was confused until he learned what a rowlock was. Pro Tip 3/3Visual Clue Visualize a rowlock as a small bracket or notch on a boat. She pointed to the rowlock and demonstrated how to secure the oar.