[L. canalis, a pipe.] A waterway made for boats or ships or for irrigation. The barrier which confines the water is called the weir or guard-lock, and the enclosure with gates at each end to raise or lower boats as they pass from one level to another iscalledthelift-lock. Most famous among canals is the Suez Canal, which was opened November 17,1869. It is 87 miles long - 66 miles actual canal and 21 miles lake - connecting the Mediterranean and the Red Seas. An effort to connect the Atlantic and the Pacific Oceans by a canal across the Isthmus of Panama has been made, but as yet without success, and it is proposed to make a similar canal across Nicaragua by the United States government. There are thousands of miles of canals in Europe and America.