noun (plural data)
- See also data.
- an assumption or premise from which inferences may be drawn: this is not a permanent and unchangeable datumSee also sense datum.
- 2a fixed starting point of a scale or operation: an accurate datum is formed by which other machining operations can be carried outSee also ordnance datum.
mid 18th century: from Latin, literally 'something given', neuter past participle of dare 'give'