n a room where books are kept
n a collection of literary documents or records kept for reference or borrowing
n a depository built to contain books and other materials for reading and study
n (computing) a collection of standard programs and subroutines that are stored and available for immediate use
n a building that houses a collection of books and other materials
n. 图书馆查询系统；函数库；图书馆（library的复数）