Definition of "cataract" [cat•a•ract]

• A large or high waterfall. (noun)
• A great downpour; a deluge. (noun)
• Pathology Opacity of the lens or capsule of the eye, causing impairment of vision or blindness. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The actual meaning of the term cataract is waterfall and refers to the opacity of the crystalline lens of the eye."
• "Caught on a small black marabou jig in cataract creek AB"
• "A lot of that cloudiness leads to vision impairment that we call cataract formation."