Definitions for underreportˌʌn dər rɪˈpɔrt, -ˈpoʊrt
Random House Webster's College Dictionary
un•der•re•portˌʌn dər rɪˈpɔrt, -ˈpoʊrt(v.t.; v.i.)
to report as less or fewer than is correct.
Category: Common Vocabulary, Business
Origin of underreport:
To report a number falsely, making it smaller than it ought to be, especially to do so intentionally
As a group, to report something less frequently than it actually occurs
Women tend to underreport rape.