a single piece of information, as a fact, statistic, or code; an item of data.
any fact assumed to be a matter of direct observation.
any proposition assumed or given, from which conclusions may be drawn.
Surveying, Civil Engineering. any level surface, line, or point used as a reference in measuring elevations.
Surveying. a basis for horizontal control surveys, consisting of the longitude and latitude of a certain point, the azimuth of a certain line from this point, and two constants used in defining the terrestrial spheroid.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
British Dictionary definitions for datum
a single piece of information; fact
a proposition taken for granted, often in order to construct some theoretical framework upon it; a given: See also sense datum
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012