parasite /ˈpæɹəˌsaɪt/noun 8verb 1forms 3 noun8 •An organism that lives on or in another organism of a different species, deriving benefit from living on or in that other organism, while not contributing towards that other organism sufficiently to cover the cost to that other organism.Lice, fleas, ticks, and mites are widely spread parasites. •(informal) An internal parasite that is an animal or protist.Any germs or parasites on the surface of the meat that you could conceivably wash off are gonna die as soon as you cook it, so don't bother washing it. — 2020 •(offensive) A person who lives on other people's efforts or expense and gives little or nothing back.A royalist who publicly called for a military intervention to protect the parasite monarchy. — 2021 •(offensive) A sycophant or hanger-on. •A component of a composite aircraft which is carried aloft and air-launched by a larger carrier aircraft or mother ship to support the primary mission of the carrier; a parasite aircraft. •[before a noun] An isolated (FSDU) (freestanding display unit ) •(literary) A climbing plant which is supported by a wall, trellis etc.Her golden tresses shade / The bosom's stainless pride, / Curling like tendrils of the parasite / Around a marble column. — 1813 •(historical) A retainer or companion of an ancient Celtic warrior, who praised him in song or poetry at gatherings; a bard. verb1 •(rare) To parasitize. formsparasited · parasiting · parasites