Definition of "unflattering"

Daniel Halper, online editor at the conservative Weekly Standard and the author of Clinton, Inc., an unflattering portrait of the Clintons, theorizes Huma had little choice after the second sexting fiasco but to stick with Hillary.

2016 January 31, “Is Huma Abedin Hillary Clinton’s Secret Weapon or Her Next Big Problem?”, in Vanity Fair, retrieved 21 January 2016