A more thorough explanation:

Definition: Datum (day-tum) is a piece of information or a date. It comes from the Latin word "dare" which means "to give".

• The temperature of the room is a datum.
• The time of the meeting is a datum.
• The weight of the object is a datum.

These examples illustrate how a datum is a piece of information. In each case, there is a specific piece of information that is being referred to. The temperature, time, and weight are all specific pieces of information that can be measured and recorded.