datum

Borrowed from Latin datum (“a given”). Doublet of die.

• IPA^(key): /ˈdeɪtəm/, /ˈdætəm/, /ˈdɑːtəm/ (see data for regional distribution)

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• Rhymes: -eɪtəm, -ætəm, -ɑːtəm

datum (plural (senses 1–3) data or (senses 1 and 4–5) datums)

1. (dated) Singular of data; a single recorded observation.

   Synonym: data point

   Holonym: data set

2. (philosophy) A fact known from direct observation.
3. (philosophy) A premise from which conclusions are drawn.
4. (cartography, surveying, engineering) A fixed reference point or set of reference points which precisely define a system of measurement or a coordinate system.

   Near-synonym: benchmark

   A geodetic datum is sometimes also called a benchmark.

   The machinist is required to measure this dimension from the hole circle datum when determining whether it is within tolerance.

   • 2000, Nuno Sergio Marques Antunes, “The Importance of the Tidal Datum in the Definition of Maritime Limits and Boundaries”, in Maritime Briefing, volume 2, number 7, International Boundaries Research Unit, University of Durham, page 5:

     In a strict sense, a tidal datum can be understood as the reference plane (or surface) to which the height of a predicted tide is referred. […] Sounding and chart datums are low water datums, that is, they refer to the level of the water surface at low tide. Nonetheless, there are also datums based on high water levels. […] These two different datums may be included in the broader category of vertical datums, which comprises any plane or surface used as a reference to measure vertical distances (such as depths, drying features, heights on shore, etc.).

   • 2007, Roger F Tomlinson, Thinking about GIS: geographic information system planning for managers:

     Datums are another important map aspect related to projection. A datum provides a base reference for measuring locations on Earth's surface.

   • 2012, Yong-Qi Chen, Yuk-Cheung Lee, chapter 2.3, in Geographical Data Acquisition:

     For horizontal measurements [on the Earth], we fix a mathematical body of Earth in space using a Cartesian coordinate system. After that, a separate coordinate system is created over the surface of this body to generate horizontal coordinates. A mathematical earth body fixed in space makes up the horizontal datum.

5. (nautical) A floating reference point, or SLDMB, used to evaluate surface currents in a body of water. Often employed by coastal search and rescue.

See data § Usage notes.

datum (third-person singular simple present datums, present participle datuming or datumming, simple past and past participle datumed or datummed)

1. To provide missing data points by using a mathematical model to extrapolate values that are outside the range of a measuring device.
   • 1982, Paul M. Tucker, Pitfalls Revisited - Issue 3, →ISBN, page 6:

     Removing the effects of any period of deformation by datuming or flattening selective reflection horizons should restore the structure prior to the datumed horizon, or the amount of deformation above the datumed horizon.

   • 1998, Stuart Fagin, Model-based Depth Imaging, →ISBN, page 164:

     On the left the stacking velocity functions are datumed to sea level and show great disparity.

   • 2014, Hua-Wei Zhou -, Practical Seismic Data Analysis, →ISBN, page 62:

     On the other hand, if we have a sufficiently accurate near-surface velocity model, we may apply wavefield datuming to convert the raw data into new data as if they were recorded along a datum below the near surface (Box 2.3).

• data, information
• die, dice

• AskOxford.com: Is 'data' singular or plural?
• “datum”, in Dictionary.com Unabridged, Dictionary.com, LLC, 1995–present. (The American Heritage Dictionary's usage note on 'data')
• John Quiggin: Data is not the plural of datum
• johnaugust.com: ‘Data’ is singular
• “datum”, in OneLook Dictionary Search.

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datum n

1. date (point in time)

• “datum”, in Příruční slovník jazyka českého (in Czech), 1935–1957
• “datum”, in Slovník spisovného jazyka českého (in Czech), 1960–1971, 1989

From Middle Dutch datum, from Latin datum (“given”, past participle) (from the practice of signing letters in Latin by noting the date on which they were dispatched). Compare English date.

• IPA^(key): /ˈdaːtʏm/

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• Hyphenation: da‧tum

datum m (plural datums or data, diminutive datumpje n)

1. date (point in time)

Datum is one of the few Dutch words ending on -um that does not have a neutral gender.

• geboortedatum
• overlijdensdatum
• trouwdatum

• Negerhollands: datum
• → Caribbean Javanese: dhatem

datum n (plural data, diminutive datumpje n)

1. datum (piece of information)

   Synonym: gegeven

From Dutch datum, from Middle Dutch datum, from Latin datum (“given”, past participle).

• IPA^(key): [ˈdatʊm]
• Hyphenation: da‧tum

datum (plural datum-datum, first-person possessive datumku, second-person possessive datummu, third-person possessive datumnya)

1. date (day and month)

   Synonyms: hari bulan, penanggalan, tanggal, tarikh

2. (cartography, engineering) A fixed reference point, or a coordinate system.

datum (plural data, first-person possessive datumku, second-person possessive datummu, third-person possessive datumnya)

1. a single information

• “datum” in Kamus Besar Bahasa Indonesia, Jakarta: Agency for Language Development and Cultivation – Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia, 2016.

Neuter past participle of dō.

• (Classical Latin) IPA^(key): /ˈda.tum/, [ˈd̪ät̪ʊ̃ˑ]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈda.tum/, [ˈd̪äːt̪um]

datum n (genitive datī); second declension

1. gift, present

   Synonyms: pretium, dōnum, praemium, datiō, oblātiō

   • c. 209 BCE, Plautus, Asinaria 56:

     Quia non suppetunt dictis data.

     Because his gifts do not match his words.

Second-declension noun (neuter).

• datus

datum

1. accusative supine of dō

datum

1. inflection of datus:
   1. nominative/accusative/vocative neuter singular
   2. accusative masculine singular

• datum in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• “datum”, in The Perseus Project (1999) Perseus Encyclopedia‎^[1]
• “datum”, in Harry Thurston Peck, editor (1898), Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
• “datum”, in William Smith, editor (1854, 1857), A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly

datum

1. vocative singular of datums

From Latin datum. Doublet of dato.

• IPA^(key): /ˈdɑː.tʉm/

datum n (definite singular datumet, indefinite plural datum, definite plural datuma)

1. (dated) a date (specific day in time)
2. a fact

• datere

• “datum” in The Nynorsk Dictionary.

From Latin datum.

• IPA^(key): /dǎːtum/
• Hyphenation: da‧tum

dátum m (Cyrillic spelling да́тум)

1. date (as in day, month, and year)

• “datum”, in Hrvatski jezični portal [Croatian language portal] (in Serbo-Croatian), 2006–2024

• IPA^(key): /dàːtum/, /dáːtum/

dātum m inan

1. date (point of time)

The diacritics used in this section of the entry are non-tonal. If you are a native tonal speaker, please help by adding the tonal marks.

Masculine inan., hard o-stem
nom. sing.	dátum
gen. sing.	dátuma
	singular	dual	plural
nominative (imenovȃlnik)	dátum	dátuma	dátumi
genitive (rodȋlnik)	dátuma	dátumov	dátumov
dative (dajȃlnik)	dátumu	dátumoma	dátumom
accusative (tožȋlnik)	dátum	dátuma	dátume
locative (mẹ̑stnik)	dátumu	dátumih	dátumih
instrumental (orọ̑dnik)	dátumom	dátumoma	dátumi

From Latin datum (“given”, past participle).

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datum n

1. date; (day, month and year)

• The now very uncommon (or obsolete) declension datot-data was used in 1958.

• datumlinjen
• datera
• bäst-före-datum

• mutad