Baseline meaning

bāslīn
(baseball) The base path.
noun
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The horizontal line to which the bottoms of lowercase characters (without descenders) are aligned. See typeface.
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A line that is a base for measurement or for construction.

A laser level generates a convenient baseline for interior work.

noun
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A datum used as the basis for calculation or for comparison.

We used used the last doctor visit to provide baselines for vital statistics.

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(typography) A line used as the basis for the alignment of glyphs.

Several characters typically have descenders below the lower baseline.

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(tennis) The line at the farthest ends of the court indicating the boundary of the area of play.

The ref missed the call. The ball hit the baseline.

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(engineering) A configuration of software, hardware, or a process that is established and documented as a point of reference.

The baseline configuration includes unsupported components.

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(engineering, computing) To provide a baseline for measurement.
verb
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(tennis) To play from the baseline.
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Origin of baseline