crossgrade noun 2verb 2forms 3 noun2 •An upgrade of a software application that enables it to run on a different platform.If you install the upgrade or cross-grade first and then perform your migration, you may accidentally wind up with corrupted application settings. — 2009 •A switch from an existing subscription to one at the same price or service level. verb2 •To upgrade (a software application) so that it is able to run on a different platform. •To switch from an existing subscription to one at the same price or service level. formscrossgraded · crossgrading · crossgrades