noun
The most common meaning; a shop that sells books.
駅前の本屋で雑誌を買った。
I bought a magazine at the bookstore in front of the station.
noun
Less common; refers to a publishing company. Often used in the name of a publisher, e.g., ○○本屋.
あの本屋は学術書を多く出している。
That publisher puts out many academic books.
noun
Rare; used in the context of a temple or shrine complex to refer to the main hall. More commonly expressed as 本堂.
その寺の本屋は江戸時代に建てられた。
The main building of that temple was built in the Edo period.