trivi·al·ize trivializes trivializing trivialized in BRIT, also use trivialise disapproval If you say that someone trivializes something important, you disapprove of them because they make it seem less important, serious, and complex than it is. It never ceases to amaze me how the business world continues to trivialize the world's environmental problems. to make something seem less important or serious than it really is - used to show disapproval