Any of various invertebrates, especially an annelid, flatworm, nematode, or nemertean, having a long, flexible, rounded or flattened body, often without obvious appendages, Something, such as the thread of a screw or the spiral condenser in a still, that resembles a worm in form or appearance, Computers A malicious program that replicates itself until it fills all of the storage space on a drive or network, intransitive verb_ To make (one's way) with the sinuous crawling motion of a worm, To cure of intestinal worms, To make one's way by artful or devious means.