A narrow body of water is a type of waterway that is typically long and thin, often connecting two larger bodies of water. The two crossword solutions for this term are 'STRAIT' and 'CHANNEL'. A STRAIT is a narrow body of water that connects two larger bodies of water, such as the STRAIT of Gibraltar between the Atlantic Ocean and the Mediterranean Sea. A CHANNEL is also a narrow body of water, but it is usually shallower than a STRAIT and is often used for navigation.