Etymologically
Log in

baseline

History Permalink

Etymology and origin of the English word baseline

Confidence
Established
Formation
Compound
First attested
?1556, Digges's Tectonicon
Ultimate origin
Old French base,ligne
Etymology tree
inherited borrowed derived
Ancient Greek βάσις
Latin basis
English base
English baseline
English basis
French base
Italian base
The word's journey
From the same root
English baseball ← base

Pronunciation

  • /ˈbeɪslaɪn/[1]

Etymology

It is formed from English base + line,[2][3][4][5] and is also written with a hyphen.[3]

Earliest recorded meaning

A line that forms or represents a base, or one used as a basis for measurement or for fixing positions: ?1556, in Digges's Tectonicon,[2] about 1556 in Merriam-Webster.[4] Etymonline dates it to 1750, originally in surveying,[3] and Dictionary.com to 1740–50.[5]

Semantic evolution

The literal sense was applied in perspective drawing to the line where the perspective plane meets the ground plane (1724),[2][4] in the army to the first troop formation in a column and later, chiefly in the United States, to the line of places on which an army depends for supplies (1802),[2] and in gunnery to a line on a cannon (1862–75).[2] In sport it named the line between the bases of a baseball diamond (1867)[2][3] and the line at each end of a tennis court and later of other courts (1875; 1872 in Etymonline).[2][3] In handwriting and type it is the line on which the body of the lowercase letters rests (1870).[2] The figurative sense, a minimum or starting point for comparison, appears as early as 1836,[2] and Merriam-Webster has the related scientific senses of a known quantity used as a control and an initial set of data used for comparison;[4] baseline estimate was in use by 1983.[3] In computing a baseline is also a fixed configuration of software or hardware.[1]

Timeline

  • ?1556 – a line forming a base or a basis for measurement.[2][4]
  • 1724 – in perspective drawing.[2]
  • 1750 – in surveying, according to Etymonline.[3]
  • 1802 – military senses.[2]
  • 1836 – a minimum or starting point for comparison.[2]
  • 1867 – the line between bases in baseball.[2][3]
  • 1870 – the line on which letters rest.[2]
  • 1875 – the end line of a tennis court.[2]

Modern meaning

Noun

  1. A line used as a base for measurement or construction, as in surveying.
  2. A starting point or minimum against which later results or changes are measured: The 2010 figures serve as a baseline for the survey.
  3. An initial set of observations or data used for comparison, or as a control in an experiment.
  4. The line at each end of the court in tennis, basketball and some other games.
  5. (baseball) The line from base to base, within which a runner must keep.
  6. The line on which the main body of lowercase letters rests in writing or typography.

Verb

  1. To provide a baseline for measurement.

Word family

  • baseliner

References

  1. ^ a b Wiktionary, the free dictionary, https://en.wiktionary.org
  2. ^ a b c d e f g h i j k l m n o p Oxford English Dictionary Online (accessed March 2026), Oxford: Oxford University Press
  3. ^ a b c d e f g h Harper, Douglas. Online Etymology Dictionary, https://www.etymonline.com
  4. ^ a b c d e Merriam-Webster Unabridged Dictionary (2024), online ed., Springfield, Mass.: Merriam-Webster
  5. ^ a b Dictionary.com Unabridged (2016), based on the Random House Unabridged Dictionary, New York: Random House
Cite this entry

“Baseline.” Etymologically, 24 Oct. 2026, etymologically.com/en/baseline. Accessed 24 Oct. 2026.

Last edited on . ·