worm (Noun) — 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.
worm (Noun) — A person who has a nasty or unethical character undeserving of respect.
worm (Noun) — A software program capable of reproducing itself that can spread from one computer to the next over a network. ex. "worms take advantage of automatic file sending and receiving features found on many computers"
worm (Noun) — Screw thread on a gear with the teeth of a worm wheel or rack.
worm (Verb) — To move in a twisting or contorted motion, (especially when struggling). ex. "The prisoner wormed in discomfort"
worm (Verb) — Introduce or insert (oneself) in a subtle manner. ex. "He wormed himself into the conversation of the people at the nearby table"