1.n. An image that extends to one or more edges of a printed page.
2.v. To print something so that trimming cuts off the edges of a printed area.
3.n. and v. In printing, (usually unintended) leaking of colour into surrounding areas of the paper.
4.n. and v. In analogue television engineering, soft or displaced colours caused by technical mismatches between the colour signal and the main picture signal.