spreaderPronunciation: /ˈsprɛdə(r)/Definition of spreader noun 1a device used for spreading or scattering a substance over a wide area: a fertilizer spreader a plant that grows over a wide area. a bar attached to the mast of a yacht in order to spread the angle of the upper shrouds. 2a person who spreads or disseminates something:kids are the biggest spreaders of the virusspreader in other Oxford dictionaries Definition of spreader in the US English dictionary