the world > space > extension in space > spreading or diffusion > [verb (transitive)] > spread over or through (something) > like veins or threads (3)
transitive. To spread or be distributed over or through (something) in the manner of a vein or veins. Also (occasionally) with through.
figurative. To run or pass like a continuous thread through the whole length or course of; to pervade.
transitive. To make into skeins. Also figurative.