[noun] [C] - a thin metal U-shaped pin which is used to hold part of the hair in the desired positionSee picture: Pins and needles(UK and ANZ) A hairpin bend (US hairpin turn) is a bend in the road which curves so sharply that it almost turns back to go in the opposite direction.See picture: Pins and needles
HAIRPIN
Meaning of HAIRPIN in English
Cambridge English vocab. Кембриджский английский словарь. 2012