: 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
With wide sleeves and loose-fitting trousers, the knotted center helps create an hourglass silhouette along your midline.
—
Ariel Bielsky,
InStyle,
24 June 2026
On April 25, 2025, Alicia-Adele Axiak, from the town of Caerphilly in Wales, died from a type of cancerous brain tumor known as a diffuse midline glioma (DIPG), the charity Brain Tumour Research shared in a release.
—
Adam England,
PEOPLE,
25 May 2026
The bands stopped precisely at the midline of her body, and the pigmentation of her right side was entirely normal.
—
Jerome Groopman,
New Yorker,
6 Apr. 2026
They are performed either with dumbbell free weights or by using a cable machine and are performed by moving the arms from a wide position toward the body’s midline, squeezing the chest at the top and controlling the movement on the way back.
—
Daryl Austin,
USA Today,
1 Feb. 2026
See All Example Sentences for midline
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Ariel Bielsky,
InStyle,
24 June 2026
On April 25, 2025, Alicia-Adele Axiak, from the town of Caerphilly in Wales, died from a type of cancerous brain tumor known as a diffuse midline glioma (DIPG), the charity Brain Tumour Research shared in a release.
—
Adam England,
PEOPLE,
25 May 2026
The bands stopped precisely at the midline of her body, and the pigmentation of her right side was entirely normal.
—
Jerome Groopman,
New Yorker,
6 Apr. 2026
They are performed either with dumbbell free weights or by using a cable machine and are performed by moving the arms from a wide position toward the body’s midline, squeezing the chest at the top and controlling the movement on the way back.
—
Daryl Austin,
USA Today,
1 Feb. 2026
See All Example Sentences for midline
Cite this Entry
“Midline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/midline. Accessed 28 Jun. 2026.
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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