This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A style in which hair is cut and arranged.

n. The style in which someone's hair has been cut and arranged.

n. the arrangement of the hair (especially a woman's hair)

"This sounds to me a bit like Paris Hilton telling me that a certain hairstyle is no longer in vogue."

hair   

Wikipedia article on hairstyles   

ponytail    tress    roach    Bob    thatch    braid    plait    Marcel    afro    haircut   

hairdo    haircut   

hairdo    brotherliness    andcreative    characterizations    unilateralist    drifter    toilet-table