usage: any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae
2. worm, louse, insect, dirt ball, unpleasant person, disagreeable person
usage: a person who has a nasty or unethical character undeserving of respect
3. worm, malevolent program
usage: a software program capable of reproducing itself that can spread from one computer to the next over a network; "worms take advantage of automatic file sending and receiving features found on many computers"
4. worm, screw
usage: screw thread on a gear with the teeth of a worm wheel or rack