The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A lake of southwest Oregon in a volcanic crater of the Cascade Range. At 589.3 m (1,932 ft) deep, it is the second-deepest lake in North America and the deepest in the United States. The lake and surrounding parkland are popular tourist attractions.