base line

n.

1. 1. A line serving as a basis, as for measurement, calculation, or location.
   2. A measurement, calculation, or location used as a basis for comparison.
2. Baseball. The base path.
3. Sports.
   1. The boundary line at either end of a court, as in basketball or tennis.
   2. The area near this boundary line: made a basket from the base line.
   3. A style of play in tennis in which the player remains near the base line and rarely approaches the net.

The horizontal line to which the bottoms of lowercase characters (without descenders) are aligned. See typeface.

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A benchmark used as a basis for comparison.

Investopedia Says:
Baselines are typically used for measuring something. For instance, when a company wants to measure the success of its product, it may use the number of products sold the previous year as its baseline.

Related Links:
Learn this easy-to-understand technique of analyzing a company's financial statements and reports. Introduction To Fundamental Analysis
The investing world loves to talk about fundamentals, but what does the term really mean? What Are Fundamentals?

Line upon which the body of lowercase letters and the base of all capital letters rest.

Part of the Rectangular Survey or Government Rectangular Survey method of land description. The baseline is the major east-west line to which all north-south measurements refer.
Example: See Base and Meridian.

1. in surveying, a surveyed line established with more than usual care, to which surveys are referred for coordination and correlation.

2. in photogrammetry, the line between the principal points of two consecutive vertical air photographs, usually measured on one photograph after the principal point of the other has been transferred.

3. in radio navigation systems, the shorter arc of the great circle joining two radio transmitting stations of a navigation system.

4. in triangulation, the side of one of a series of coordinated triangles the length of which is measured with prescribed accuracy and precision and from which lengths of the other triangle sides are obtained by computation.

See the Introduction, Abbreviations and Pronunciation for further details.

A surveyed line which has been established with more than usual care, and to which surveys are referred for coordination and correlation.

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A level of performance or fitness prior to training, which is used as a standard to evaluate the effects of the training.

This entry contains information applicable to United States law only.

Survey line used in the government survey to establish township lines. Horizontal elevation line used as a centerline in a highway survey.

A known value or quantity used to measure or assess an unknown, as a baseline urine sample.

• b. data — a set of data collected at the beginning of a study or before intervention has occurred.

(DOD) 1. (surveying) A surveyed line established with more than usual care, to which surveys are referred for coordination and correlation. 2. (photogrammetry) The line between the principal points of two consecutive vertical air photographs. It is usually measured on one photograph after the principal point of the other has been transferred. 3. (radio navigation systems) The shorter arc of the great circle joining two radio transmitting stations of a navigation system. 4. (triangulation) The side of one of a series of coordinated triangles the length of which is measured with prescribed accuracy and precision and from which lengths of the other triangle sides are obtained by computation.

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Dansk (Danish)
n. - bundlinje, baglinje

Français (French)
n. - (Sport) ligne des bases (base-ball), base, ligne zéro (d'un diagramme), ligne de fond (tennis), (Art) ligne de fuite, (Fin) (coûts) de base

Deutsch (German)
n. - Grundlinie

Ελληνική (Greek)
n. - γραμμή αφετηρίας

Italiano (Italian)
linea di fondo

Português (Portuguese)
n. - linha (f) que serve de base, linha (f) entre duas bases (beisebol) (Esp.)

Русский (Russian)
исходная линия

Español (Spanish)
n. - línea de fondo, línea de base, línea de saque, línea de referencia

Svenska (Swedish)
n. - baslinje

中文（简体）(Chinese (Simplified))
基线, 底线

中文（繁體）(Chinese (Traditional))
n. - 基線, 底線

한국어 (Korean)
n. - 베이스 라인, 원근선

日本語 (Japanese)
n. - 基線, ベースライン

עברית (Hebrew)
n. - ‮קו הבסיס‬

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