- to report as less or fewer than is correct: to underreport the enemy's strength.
Origin of underreport
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for underreport
Manning, who had resigned a month earlier, alleges she was forced to underreport sexual-assault cases.Expelled for Speaking Out About Rape?
February 28, 2013