Sail/seɪl/ Definition 1 of 4Pro Tip 1/3Nautical Imagery Used in contexts relating to the sea, sailing, or nautical adventures. His room was decorated with sailboats and sails. Pro Tip 2/3Not Just Ships 'Sail' can refer to any vessel's material, not exclusively traditional ships. Even small dinghies have sails. Pro Tip 3/3Metaphorical Use Metaphorically, it can symbolize embarking on new ventures or adventures. He raised his sail towards the uncharted business world.