Meaning ofdatumin English

Noun

1. a recorded measurement on a defined scale
   The scientist collected a datum on the temperature outside.
2. a fact from direct observation; known information
   A single datum can be used to calculate the average.
3. a fixed reference point for measurement systems
   The datum mark on the map served as a reference point.
4. a single recorded observation (outdated usage)
   In the past, a datum referred to any single piece of information.