Synonyms of hairline

hairline 1 of 2

adjective

1

as in thin

being of less than usual width

a hairline crack in the mug, almost too small to notice, was enough to make the mug break when filled with hot tea

Synonyms & Similar Words

• thin
• narrow
• slender
• skinny
• fine
• slim
• ultrathin
• close
• linear
• needlelike
• tight
• paper-thin
• elongate
• spare
• tightened
• compressed
• wispy
• slim-jim
• squeezed
• condensed
• attenuated
• stringy
• reedy
• spindly
• lanky
• lank
• willowy
• contracted
• constricted
• attenuate
• rangy
• twiggy
• bottleneck
• stalky
• shoestring

Antonyms & Near Antonyms

• wide
• broad
• fat
• thick
• thickset
• squat
• stocky
• stumpy
• chunky
• massive
• voluminous
• bulky
• thickish
• widish

2

as in subtle

made or done with extreme care and accuracy

a hairline distinction between her rating of certain things as "necessary" and others as "absolutely necessary"

Synonyms & Similar Words

• subtle
• delicate
• fine
• exact
• nice
• minute
• hairsplitting
• refined
• nuanced
• meticulous
• finespun
• petty
• trivial
• particular
• exacting
• trifling
• negligible
• insignificant
• nitpicking
• inconsiderable
• inconsequential
• finical
• fastidious
• frivolous
• piddling
• quibbling
• demanding
• finicking
• finicky
• fussy
• picky

Antonyms & Near Antonyms

• coarse
• apparent
• rough
• obvious
• evident
• plain
• clear
• inexact
• unmistakable
• transparent
• broad
• manifest
• palpable
• unequivocal
• indefinite
• unambiguous
• patent
• clear-cut
• careless
• sloppy
• open-and-shut
• perspicuous
• heedless
• slipshod
• incautious
• slapdash

3

as in mathematical

meeting the highest standard of accuracy

an ultrasensitive telescope that requires hairline placement of the lenses

Synonyms & Similar Words

• mathematical
• accurate
• precise
• close
• fine
• exact
• correct
• delicate
• rigorous
• pinpoint
• careful
• refined
• strict
• definite
• right
• spot-on
• definitive
• subtle
• true
• meticulous
• finical
• nice
• fastidious
• finicky

Antonyms & Near Antonyms

• coarse
• round
• approximate
• rough
• wrong
• false
• loose
• inaccurate
• inexact
• incorrect
• careless
• indefinite
• imprecise
• vague
• unclear
• questionable
• doubtful
• untrue
• dubious
• unreliable
• untrustworthy

hairline

2 of 2

noun

ˈher-ˈlīn 

as in inch

a very small distance or degree

the controversial measure passed by a hairline, the margin of victory being but a single vote

Synonyms & Similar Words

• inch
• hair
• neck
• step
• hairbreadth
• bit
• ace
• shouting distance
• stone's throw
• hop, skip, and jump
• trifle
• smidgen
• minim
• dab
• particle
• iota
• mite
• trace
• jot
• crumb

Antonyms & Near Antonyms

• mile
• long haul
• infinity
• country mile
• light-year

Example Sentences

Recent Examples of hairline

Noun

For that reason, minoxidil tends to be most helpful with androgenetic alopecia, which usually looks like gradual thinning at the crown or around the hairline. — Deanna Pai, Vogue, 9 July 2026

Black-fly bites from the week before had crusted near our hairlines and circled our wrists. — John Todd, Outdoor Life, 9 July 2026

Practically architectural in its precision, her hair is pulled straight back and upwards without a visible part to create a smooth, downright reflective surface from her hairline to the crown. — Marci Robin, Allure, 3 July 2026

Reapplying sunscreen every two hours is the rule almost nobody follows, especially over makeup, on the go or across a hairline that’s already been styled. — Lauren Jarvis-Gibson july 1, Charlotte Observer, 1 July 2026