baseline

noun

base·​line ˈbās-ˌlīn How to pronounce baseline (audio)
often attributive
1
: a line serving as a basis
especially : one of known measure or position used (as in surveying or navigation) to calculate or locate something
2
a
: either of the lines on a baseball field that lead from home plate to first base and third base and are extended into the outfield as foul lines
b
3
: a boundary line at either end of a court (as in tennis or basketball)
4
: a usually initial set of critical observations or data used for comparison or a control
5
: a starting point
the baseline of this discussion

Examples of baseline in a Sentence

The experiment is meant only to provide a baseline for other studies. any year or event we use as the baseline for the Renaissance is going to be at least somewhat arbitrary
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Known for her dominant baseline game, Sabalenka has been in top form throughout the tournament. Kilty Cleary, MSNBC Newsweek, 10 July 2025 Establish Baseline Measurements Before implementing any AI solution, establish baseline measurements. Caroline Castrillon, Forbes.com, 10 July 2025 How Personality May Shape Your Workout Preferences An analysis of the data collected revealed that the big five personality traits were strong predictors of whether a person would stick with an exercise plan, which types of exercise someone enjoyed, and baseline fitness. Emily Kay Votruba, EverydayHealth.com, 10 July 2025 The letters were posted on Truth Social after the expiration of a 90-day negotiating period with a baseline levy of 10%. Josh Boak, Chicago Tribune, 9 July 2025 See All Example Sentences for baseline

Word History

First Known Use

circa 1556, in the meaning defined at sense 1

Time Traveler
The first known use of baseline was circa 1556

Browse Nearby Words

Cite this Entry

“Baseline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/baseline. Accessed 17 Jul. 2025.

Kids Definition

baseline

noun
base·​line ˈbās-ˌlīn How to pronounce baseline (audio)
1
: a line used as a base
2
a
: either of two straight lines on a baseball field leading from home plate to first base and third base and extending into the outfield
b

Medical Definition

baseline

noun
base·​line ˈbā-ˌslīn How to pronounce baseline (audio)
: a set of critical observations or data used for comparison or a control

More from Merriam-Webster on baseline

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