Synonyms of 'data'
a series of observations, measurements, or factsThe survey was based on data from 2,100 patients.
From a historical point of view only, the word data is a plural. In fact, in many cases it is not clear from context if it is being used as a singular or plural, so there is no issue: when next needed the data can be accessed very quickly. When it is necessary to specify, the preferred usage nowadays in general language is to treat it as singular, as in: this data is useful to the government in the planning of housing services. There are rather more examples in the Bank of English of these data than this data, with a marked preference for the plural in academic and scientific writing. As regards data is versus data are, the preference for the plural form overall is even more marked in that kind of writing. When speaking, however, it is best to opt for treating the word as singular, except in precise scientific contexts. The singular form datum is comparatively rare in the sense of a single item of data.
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in the sense of dope
They had plenty of dope on him.
in the sense of input
the data fed into a computer
a variety of types of input in the classroom
Video: pronunciation of 'data'
Thesaurus for data from the Collins English Thesaurus