datum

noun

da·​tum ˈdā-təm How to pronounce datum (audio) ˈda- How to pronounce datum (audio)
ˈdä-
1
plural data ˈdā-tə How to pronounce datum (audio) ˈda- How to pronounce datum (audio)
also
ˈdä- How to pronounce datum (audio)
: something given or admitted especially as a basis for reasoning or inference
an important historical datum
This enormous expense—and considerable risk—to pick up a datum or two about geriatrics?Charles Krauthammer
2
plural datums, mathematics : something used as a basis for calculating or measuring
measuring the distance between datum points
… make things more efficient for those of us whose work requires a time datum.Robert Steinbrunn
Is data singular or plural?: Usage Guide

Data leads a life of its own quite independent of datum, of which it was originally the plural. It occurs in two constructions: as a plural noun (like earnings), taking a plural verb and plural modifiers (such as these, many, a few) but not cardinal numbers, and serving as a referent for plural pronouns (such as they, them); and as an abstract mass noun (like information), taking a singular verb and singular modifiers (such as this, much, little), and being referred to by a singular pronoun (it). Both constructions are standard. The plural construction is more common in print, evidently because the house style of several publishers mandates it.

Examples of datum in a Sentence

let's begin our discussion of this matter with a datum from actual experience
Recent Examples on the Web European countries do a far better job, with the average collection of glass packaging for recycling hitting 80% in 2021, according to Close the Glass Loop, a industry outlet which tacks the data. Ashley Miznazi, Miami Herald, 8 June 2024 Stanford is among the most selective US colleges, admitting 3.9% of the applicants for the class of 2027, according to university data. Eva Roytburg, Fortune, 8 June 2024 The latest available data from the FWS shows that from 2015-2019, nearly 50,000 live plants and animals were seized or abandoned in the U.S. over that four year period — an average of about 27 individuals per day. Rachel Carlson, NPR, 8 June 2024 Average hourly wages surged 4.1% over the year ending in May, the fresh data on Friday showed. Max Zahn, ABC News, 7 June 2024 See all Example Sentences for datum 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'datum.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Latin, from neuter of datus

First Known Use

1646, in the meaning defined at sense 1

Time Traveler
The first known use of datum was in 1646

Dictionary Entries Near datum

Cite this Entry

“Datum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/datum. Accessed 12 Jun. 2024.

Kids Definition

datum

noun
da·​tum ˈdāt-əm How to pronounce datum (audio) ˈdat- How to pronounce datum (audio)
ˈdät-
plural data -ə How to pronounce datum (audio) or datums
: something used as a basis for reasoning or arriving at a conclusion or for calculating or measuring

More from Merriam-Webster on datum

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