1
: a very slender line: such as
a
: a tiny line or crack on a surface
a hairline bone fracture
b
: a fine line connecting thicker strokes in a printed letter
2
3
a
: a textile design consisting of lengthwise or crosswise lines usually one thread wide
b
: a fabric with such a design
4
a
: the outline of scalp hair especially on the forehead
b
: the way the hair frames the face
hairline
adjective
Examples of hairline in a Sentence
The plate had a hairline running across it.
He has a receding hairline.
Recent Examples on the Web
His receding hairline could no longer be disguised with styling products, and even his partner noticed how much the hair loss was accelerating.
—
Matthew Kayser, USA Today, 8 Oct. 2025
Hairline Texture, Ingrowns, and Dark Spots—Without the Buildup Those of us who wear edge control, gels, or protective styles know the hairline is its own micro-climate.
—Larry Stansbury, Essence, 7 Oct. 2025
At Smile Hair Clinic, the hairline is planned according to the patient’s facial proportions, age group, and personal preferences.
—Lyssanoel Frater, IndyStar, 6 Oct. 2025
Last week, at the Glasgow stop of her Infinity Heart tour, Siwa unexpectedly ejected two fans from the show over a hoodie that featured Siwa photoshopped onto an egg, an image that appeared to be mocking her hairline.
—Shania Russell, Entertainment Weekly, 6 Oct. 2025
See All Example Sentences for hairline
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Matthew Kayser, USA Today, 8 Oct. 2025
Hairline Texture, Ingrowns, and Dark Spots—Without the Buildup Those of us who wear edge control, gels, or protective styles know the hairline is its own micro-climate.
—Larry Stansbury, Essence, 7 Oct. 2025
At Smile Hair Clinic, the hairline is planned according to the patient’s facial proportions, age group, and personal preferences.
—Lyssanoel Frater, IndyStar, 6 Oct. 2025
Last week, at the Glasgow stop of her Infinity Heart tour, Siwa unexpectedly ejected two fans from the show over a hoodie that featured Siwa photoshopped onto an egg, an image that appeared to be mocking her hairline.
—Shania Russell, Entertainment Weekly, 6 Oct. 2025
See All Example Sentences for hairline
Cite this Entry
“Hairline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hairline. Accessed 26 Oct. 2025.
Copy CitationKids Definition
hairline
noun
hair·line
ˈha(ə)r-ˌlīn 
ˈhe(ə)r-
1
a
: a very slender line
b
: a very thin crack on a surface
a hairline bone fracture
2
: the outline of the hair on the head and especially on the forehead
hairline
adjective
Medical Definition
hairline
noun
hair·line
-ˈlīn
: the outline of scalp hair especially on the forehead
hairline
adjective
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