n.
1.a room where books are kept
2.a collection of literary documents or records kept for reference or borrowing
3.a depository built to contain books and other materials for reading and study
4.(computing) a collection of standard programs and subroutines that are stored and available for immediate use
5.a building that houses a collection of books and other materials
Idiom of the Day
work out (something) or work (something) out
to solve a problem
I could not work out the math problem on the final examination.