A shop where barbering services such as haircuts, shaves, and shampooing are provided. Often used in contrast to 美容院 (beauty salon).
See also: 理容室 (りようしつ)
A new barbershop opened in front of the station.
My father gets his hair cut at the same barbershop every month.
理容室 is a near-synonym for 理容院, but 理容室 can sound slightly more clinical or refer to the barbering room itself.
Compound of 理容 (barbering, hairdressing) and 院 (institution, shop). The exact historical derivation is uncertain, but the kanji are conventionally associated with the meaning.