Nautical/ˈnɔːtɪkl/ Definition 1 of 1Pro Tip 1/3Profession Specific Mostly used in contexts related to marine professions or studies. He's studying nautical engineering. Pro Tip 2/3Navigation Use Commonly used when discussing navigation and maritime travel. We need to purchase a reliable nautical compass for our voyage. Pro Tip 3/3Historical Reference Often found in historical contexts describing old shipping practices or exploration. The nautical prowess of ancient sailors was remarkable.