: a median line
especially
: the median line or median plane of the body or some part of the body
Examples of midline in a Sentence
Recent Examples on the Web
The visage on the right, also gilded above the midline and black below, greets us with notable features, potentially alluding to evolution.
—
Natasha Gural, Forbes.com, 20 Aug. 2025
Focus on leg movement towards the midline to engage the adductors and enhance overall hip strength.
—Sixteen Ramos, USA Today, 12 Aug. 2025
Mack announced in January that she had been diagnosed with diffuse midline glioma, an extremely rare type of astrocytoma cancer.
—Marlene Lenthang, NBC news, 6 Aug. 2025
There is a balance exercise in every interactive area to help children practice midline crossing, the ability to move your eyes across the midline of your body.
—Nollyanne Delacruz, The Mercury News, 18 Mar. 2025
See All Example Sentences for midline
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Natasha Gural, Forbes.com, 20 Aug. 2025
Focus on leg movement towards the midline to engage the adductors and enhance overall hip strength.
—Sixteen Ramos, USA Today, 12 Aug. 2025
Mack announced in January that she had been diagnosed with diffuse midline glioma, an extremely rare type of astrocytoma cancer.
—Marlene Lenthang, NBC news, 6 Aug. 2025
There is a balance exercise in every interactive area to help children practice midline crossing, the ability to move your eyes across the midline of your body.
—Nollyanne Delacruz, The Mercury News, 18 Mar. 2025
See All Example Sentences for midline
Cite this Entry
“Midline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/midline. Accessed 9 Sep. 2025.
Copy CitationKids Definition
midline
noun
mid·line
ˈmid-ˌlīn 
: 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
midline
noun
mid·line
ˈmid-ˌlīn, ˌmid-ˈlīn
: a median line
especially
: the median line or median plane of the body or some part of the body
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