From King Dictionary of Contemporary English
Related topics: Crafts, Occupations
coopercoo‧per /ˈkuːpə $ -ər/ noun [countable] TICBOsomeone who makes barrels
Examples from the Corpus
cooperIt is coopers ation in the sense that both want the best for the other.As well as seeing how whisky is made, visitors to the Glenfiddich Distillery can see coopers making oak casks.The coopers and carpenters surged forward.It was almost impossible to know which were coopers and carpenters and which smiths.
Origin cooper (1400-1500) Middle Dutch cuper, from cupe; COOP