General English

General Science

  • noun the point from which change can be measured
  • noun a line which defines the size and layout of a page in an application
  • noun the horizontal line along which characters are printed or displayed


  • In interferometry, the distance between the farthest-separated points at which data is collected


  • A line which serves as the basis for measurement, calculation, or location. It is usually represented graphically as a horizontal line.
  • In displays, such as that of oscilloscopes and radars, the line which represents the reference level in the absence of other signals.
  • The average or reference signal level from which a pulse departs, and to which it returns.
  • In navigation, a line which joins two stations, such as the A and B stations within the loran radio navigation system.
  • acronymBL

Health Economics

  • (written as Baseline)
    The starting point in a trial or cost-effectiveness analysis in which the data have not been influenced by the intervention being studied, or the routine, treatment etc. with which other treatments are to be compared.

Information & Library Science

  • noun the data used as a reference with which to compare future observations or results


  • noun an offensive manoeuvre carried out under fire, in which men or vehicles move forward into extended line in order to engage the enemy.


  • noun a boundary line at each end of a court that marks the limit of play in tennis, badminton or basketball
  • noun on a baseball field, a line running from home plate to first base and from home plate to third base, and extending into the outfield as foul lines
  • noun in baseball, the area within which a base runner must stay when running between bases