Worm  —n. 1 any of various types of creeping invertebrate animals with long slender bodies and no limbs. 2 larva of an insect, esp. In fruit or wood. 3 (in pl.) Intestinal parasites. 4 insignificant or contemptible person. 5 spiral part of a screw. —v. 1 (often refl.) Move with a crawling motion. 2 refl. (foll. By into) insinuate oneself into favour etc. 3 (foll. By out) obtain (a secret etc.) By cunning persistence. 4 rid (a dog etc.) Of worms. [old english]