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
Synonyms
Examples of hairline in a Sentence
The plate had a hairline running across it.
He has a receding hairline.
Recent Examples on the Web
Researchers have found that putting petroleum jelly along your hairline and ears to prevent staining.
—
Sherri Gordon, Health, 11 Aug. 2024
According to He, some areas of the body that people forget to apply sunscreen to are the scalp, hairline, eyelids, ears, lips, neck, chest, the back of the hands, and the top of the feet.
—Laura Hensley, Verywell Health, 17 July 2024
All of the people seemed somewhat interchangeable, except for Zack Wickham, a gay with a disposition and hairline that only Teresa Giudice’s mother could love.
—Brian Moylan, Vulture, 30 Apr. 2024
The sister product to eye shadow, hair shadow is ideal for covering regrowth, smoothing up a patchy hairline, and hiding away any surprise grays.
—Irene Coltrinari, Vogue, 21 July 2024
See all Example Sentences for hairline 
Sherri Gordon, Health, 11 Aug. 2024
According to He, some areas of the body that people forget to apply sunscreen to are the scalp, hairline, eyelids, ears, lips, neck, chest, the back of the hands, and the top of the feet.
—Laura Hensley, Verywell Health, 17 July 2024
All of the people seemed somewhat interchangeable, except for Zack Wickham, a gay with a disposition and hairline that only Teresa Giudice’s mother could love.
—Brian Moylan, Vulture, 30 Apr. 2024
The sister product to eye shadow, hair shadow is ideal for covering regrowth, smoothing up a patchy hairline, and hiding away any surprise grays.
—Irene Coltrinari, Vogue, 21 July 2024
See all Example Sentences for hairline
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'hairline.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near hairline
Cite this Entry
“Hairline.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hairline. Accessed 12 Sep. 2024.
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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