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An integral having at least one nonfinite limit or an integrand that becomes infinite between the limits of integration.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Mathematics) a definite integral having one or both limits infinite or having an integrand that becomes infinite within the limits of integration
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
1. a definite integral whose area of integration is infinite.
2. a definite integral in which the integrand becomes infinite at a point or points in the interval of integration.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.