Meaning

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

noun a person who has a nasty or unethical character undeserving of respect

noun a software program capable of reproducing itself that can spread from one computer to the next over a network

originEtymology tree Proto-Germanic *wurmiz Proto-West Germanic *wurmi Old English wyrm Middle English worm English worm From Middle English werm, wirm, worm, worme, wrim, wurm, wyrm, wyrme, from Old English weorm, wurm, wyrm, from Proto-West Germanic *wurmi, from Proto-Germanic *wurmiz (“worm; snake”), from Proto-Indo-European *wr̥mis (“worm; larva”), possibly from *wer- (“to turn”). Doublet of vermin…

Etymology from Wiktionary, CC BY-SA 3.0