Meaning & use
datum
A single piece of information, especially one used as a basis for calculation or reasoning; the singular form of 'data.'
See it in a sentence
Each datum collected during the survey was entered into the spreadsheet by hand.
Researchers flagged one unusual datum that skewed the average temperature reading.
A note on using this word
Strictly, 'datum' is singular and 'data' is plural, though in everyday speech 'data' is often treated as singular too.
Words with a similar meaning
This term is best learned through its definition and examples.
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Another way to use it
2. noun
A fixed reference point or level used as the basis for a system of measurement.
Surveyors set the datum at sea level before mapping the elevation of the hillside.
Make it your own
Write a sentence using “datum”, then compare your use with the examples above.