Touching; conference or joining at the area or edge; hence, near collectively; neighboring; bordering or adjoining; adjacent: as, two contiguous bodies, houses, or estates: usually accompanied by to.
Particularly In entomology: Therefore thickly strewn as to be near collectively or touch, but without coalescing: because, contiguous places, dots, or punctures, Almost or very touching within base: as, contiguous antennæ.
How would you define contiguous?