Wort is the sugary liquid that’s drawn off the mash-tun in which cereals (both /either malted and un-malted) have been mashed with warm water. Once cooled, it is passed to the fermenting vats.
For those trying to understand how Wort is different to Wash and Mash – to save you clicking around: Mash is a term given when the liquid is water plus malted cereal. Wort is the term for when that liquid has become sugary and extracted everything from the cereal (at the end of the mashing process). Wash is the term given to the liquid once it’s been fermented and good to go to the still for a first distillation. They are three terms for the same liquid, they just relate to three separate stages of the brewing process.