A collection of related sets of data that is composed of separate elements but that can be manipulated as a unit and accessed or downloaded in one or more formats. Source: EU OD

A collection of data, published or curated by a single source, and available for access or download in one or more formats. Source: https://data.europa.eu/euodp/en/developerscorner

Any organised collection of data. ‘Dataset’ is a flexible term and may refer to an entire database, a spreadsheet or other data file, or a related collection of data resources. Source: ODH

The most basic representation of a dataset is data elements presented in tabular form. Each column represents a particular variable. Each row corresponds to a given value of that column’s variable. A dataset may also present information in a variety of non-tabular formats, such as an extensible mark-up language (XML) file, a geospatial data file, or an image file, etc.

Source: US OD