Much or a lot (of some quality or thing). Primarily heard in UK. He's done heaps better in maths ever since he got a tutor. I should have installed more memory into my computer ages ago—it's heaps faster now!
heaps ˈbetter, ˈmore, ˈolder, etc.(British English, informal) a lot better, etc: Help yourself — there’s heaps more. ♢ He looks heaps better than when I last saw him.