Q3 2024 Datum Plural. Definition of datum noun in oxford advanced learner's dictionary. Note:data is a plural of datum, which is originally a latin noun meaning “something given.” today, data is used in english both as a plural noun meaning “facts or pieces of information” ( these data are described more fully elsewhere ) and as a singular mass.

Data refers to a collection of facts or statistics, while datum is the singular form, representing a single piece of information. A single piece of information, as a fact, statistic, or code;