mid·​line ˈmid-ˌlīn How to pronounce midline (audio)
: a median line
especially : the median line or median plane of the body or some part of the body

Example Sentences

Recent Examples on the Web Here’s a unique mind-muscle masterpiece move that creates tons of tension at the midline, a major difference from your traditional pressing movements. Jeff Tomko, Men's Health, 22 Nov. 2022 During each condition, a malleable rubber object was presented at infant's midline to elicit reaching, grasping, and object exploration for 2 min. Seriously Science, Discover Magazine, 24 Mar. 2014 Rotate bottle or pan toward your midline, bring it back to center, then rotate in the opposite direction. Mallory Creveling, Women's Health, 23 Feb. 2023 It’s composed primarily of two muscles (the pectoralis major and minor), and its main job is to perform a very specific action: pulling the upper arms toward the midline of the body (i.e., adduction). Men's Health, 6 June 2022 One of the main functions of the chest is adduction, or driving your arms to the midline of your torso to squeeze the pecs. Brett Williams, Men's Health, 2 June 2022 From there, pull the elbows back to the midline of the body, keep them closely tucked into your sides. Ben Walker, Outside Online, 28 Aug. 2020 Her mother, Heather Krings, said on Delaney's CaringBridge site that the kind of cancer Delaney had was diffuse midline glioma, known as DMG. Cathy Kozlowicz, Journal Sentinel, 1 Feb. 2023 The researchers were also interested to see that octopuses tended to use the second arm out from the midline of their body, on the side facing the prey, to lead an attack. Veronique Greenwood, New York Times, 20 Sep. 2022 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'midline.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of midline was in the 14th century

Dictionary Entries Near midline

Cite this Entry

“Midline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/midline. Accessed 28 Mar. 2023.

Kids Definition


mid·​line ˈmid-ˌlīn How to pronounce midline (audio)
: a line through the middle of something
especially : a line through a body or one of its parts that lies in a plane dividing it into halves that are mirror images of each other

Medical Definition


: a median line
especially : the median line or median plane of the body or some part of the body
Last Updated: - Updated example sentences
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