What does "interlace" mean?

Interlace: To unite, as by lacing together; to insert or interpose one thing within another; to intertwine; to interweave. Severed into stripes That interlaced each other. Cowper. The epic way is every where interlaced with dialogue. Dryden. Interlacing arches (Arch.), arches, usually circular, so constructed that their archivolts intersect and seem to be interlaced.