Definition of "harvester"

(dated) A person who gathers the harvest (harvests the crop).  examples

A machine that gathers the harvest (harvests the crop).  examples

(forestry) A type of heavy forestry vehicle employed in cut-to-length logging for felling, delimbing and bucking trees  examples

(computing) A program or algorithm that gathers data from a source.  examples

A North American butterfly, Feniseca tarquinius, whose larvae eat aphids and are the only entirely carnivorous caterpillars in North America  examples

Any butterfly of the lycaenid subfamily Miletinae to which this belongs, which are all carnivores.  examples

(Ireland) finnock (a young sea trout)  examples