1
a
b
: the substance of the spinal cord
2
a
: the choicest of food
b
: the seat of animal vigor
c
: the inmost, best, or essential part : core
personal liberty is the marrow of the American tradition—
Clinton Rossiter
Clinton Rossiter3
chiefly British
: vegetable marrow
chiefly Scotland
: one of a pair
Phrases
to the marrow
: very deeply : very much : completely and thoroughly
I was wet and chilled to the marrow, till I felt more dead than alive.—Jack London
Jack LondonExamples of marrow in a Sentence
Recent Examples on the Web
Byjon Cohen, science.org, 11 Oct. 2024
Eaten together, on a warm masa tortilla , the marrow and the birria nearly overwhelm each other, but both are kept just in balance by the snap of pickled onion and the sharp bite of cilantro.
—Helen Rosner, The New Yorker, 20 Oct. 2024
Stem Cell Injections Stem cells are regenerative medicine obtained from the following:
Amniotic fluid
Blood
Bone marrow
Muscle
Umbilical cord
Stem cells are undifferentiated cells that can increase in number or turn into almost any other type of human cell.
—Alex Yampolsky, Verywell Health, 17 Oct. 2024
Here’s how to get to the marrow of Shenandoah’s famed Blue Ridge in one challenging day: this 9-mile loop showcases why the park is a favorite escape for East Coasters.
—Outside Online, 8 Aug. 2024
See all Example Sentences for marrow 
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Noun
Some of those cells migrate to the bone marrow, which provides safe haven for their long-term antibody production.
—Byjon Cohen, science.org, 11 Oct. 2024
Eaten together, on a warm masa tortilla , the marrow and the birria nearly overwhelm each other, but both are kept just in balance by the snap of pickled onion and the sharp bite of cilantro.
—Helen Rosner, The New Yorker, 20 Oct. 2024
Stem Cell Injections Stem cells are regenerative medicine obtained from the following:
Amniotic fluid
Blood
Bone marrow
Muscle
Umbilical cord
Stem cells are undifferentiated cells that can increase in number or turn into almost any other type of human cell.
—Alex Yampolsky, Verywell Health, 17 Oct. 2024
Here’s how to get to the marrow of Shenandoah’s famed Blue Ridge in one challenging day: this 9-mile loop showcases why the park is a favorite escape for East Coasters.
—Outside Online, 8 Aug. 2024
See all Example Sentences for marrow
Dictionary Entries Near marrow
Cite this Entry
“Marrow.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/marrow. Accessed 23 Nov. 2024.
Copy CitationMedical Definition
marrow
noun
mar·row
ˈmar-(ˌ)ō, -ə(-w) 
1
2
: the substance of the spinal cord
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