harvester noun7 •A machine that gathers the harvest (harvests the crop). •A person who gathers the harvest (harvests the crop). •A type of heavy forestry vehicle employed in cut-to-length logging for felling, delimbing and bucking trees; an instance of this type. •A program or algorithm that gathers data from a source. •A North American butterfly species, Feniseca tarquinius, whose larvae eat aphids and are the only entirely carnivorous caterpillars in North America; an individual of this species. •Any butterfly of the lycaenid subfamily Miletinae to which this belongs, which are all carnivores. •(Ireland) A finnock (a young sea trout). formsharvesters