hair

/heə/
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hair

A woman brushes her long hair in front of a mirror.

Definition
  1. Noun:
    • A filament growing from the skin of mammals: A slender, thread-like structure composed primarily of keratin, forming the characteristic covering on the body and head of humans and other animals.
    • A mass of such filaments: The aggregate of these threads, especially on a person's head.
    • A very small distance or margin: An extremely narrow interval or degree of difference.
    • A filament-like growth on a plant: A fine, hair-like projection on the surface of a plant or leaf.
Examples of Usage
  • Noun (Filament):
    • She found a single gray hair on her jacket.
    • The cat's fur is made of very fine hairs.
  • Noun (Mass of filaments):
    • He has thick, curly hair.
    • She is washing her hair.
  • Noun (Small distance):
    • The bullet missed him by a hair.
    • The race was won by a hair's breadth.
  • Noun (Plant growth):
    • The stem of the plant is covered in tiny hairs.
Advanced Usage
  • "to let one's hair down": to relax and behave informally.
    • After the exams, we can finally let our hair down.
  • "to split hairs": to make overly fine distinctions; to argue about trivial details.
    • We're just splitting hairs; the two proposals are essentially the same.
  • "a hair's breadth": a very small distance or amount.
    • The car missed the pedestrian by a hair's breadth.
  • "to get in someone's hair": to annoy or bother someone.
    • The kids have been getting in my hair all morning.
Variants and Related Words
  • Hairy (adj): Covered with hair; resembling hair.
    • He has very hairy arms.
  • Hairless (adj): Having no hair; bald.
    • A hairless cat is a unique pet.
  • Hairlike (adj): Resembling a hair; very thin and fine.
    • The hairlike structures on the insect's leg.
Synonyms
  • Fur: The thick hair covering the body of many animals.
  • Wool: The soft, curly hair from sheep.
  • Strand: A single thin length of hair, thread, or similar material.
  • Whisker: A long, stiff hair growing near the mouth of an animal.
Related Phrases (Phrasal Verbs)
  • Hair does not typically form standard phrasal verbs. The idiomatic expressions listed above function as fixed phrases.
Related Idioms
  • "to make someone's hair stand on end": to terrify or horrify someone.
    • The ghost story made our hair stand on end.
  • "to tear one's hair out": to be extremely anxious, frustrated, or worried.
    • I've been tearing my hair out trying to fix this computer.
  • "not to turn a hair": to remain completely calm and unruffled.
    • She didn't turn a hair when they told her the shocking news.
  • "the hair of the dog (that bit you)": an alcoholic drink taken to cure a hangover, from the idea of using a similar method to treat the cause.
    • After last night's party, he thinks he needs some hair of the dog.
hair

A woman brushes her long hair in front of a mirror.

Noun
  1. a filamentous projection or process on an organism
  2. cloth woven from horsehair or camelhair; used for upholstery or stiffening in garments
  3. any of the cylindrical filaments characteristically growing from the epidermis of a mammal
    • there is a hair in my soup
  4. filamentous hairlike growth on a plant
    • peach fuzz
  5. a very small distance or space
    • they escaped by a hair's-breadth
    • they lost the election by a whisker
  6. a covering for the body (or parts of it) consisting of a dense growth of threadlike structures (as on the human head); helps to prevent heat loss
    • he combed his hair
    • each hair consists of layers of dead keratinized cells