Definition of "blitter"

Not only is the Amiga blitter fully integrated with and supported by the system as a whole, it also has access to its own direct memory channel […]

1986 December 8, InfoWorld, volume 8, number 49, page 46

Using the hardware blitter to move bitmaps from VRAM to VRAM is much faster than moving them from system memory to VRAM.

2002, André LaMothe, Tricks of the Windows Game Programming Gurus, page 315