Our aim in this document (working paper) is to further research into the gap between the potential that corpora have for translation and the way professional translators actually use corpora. In our Switzerland-based survey, we questioned translators about their use of corpora and concordancers, and asked them to give their own definition of the notion of "corpus". Our preliminary results can be interpreted to show that the gap can in part be explained by the fact that scholars and translators do not agree on how the term should be defined.