| librarian | (noun) a professional person trained in library science and engaged in library services | Synonyms: bibliothec |
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| librarianship | (noun) the position of librarian | - |
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| library | (noun) a depository built to contain books and other materials for reading and study | Synonyms: depository library |
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| (noun) a room where books are kept | - |
| (noun) a building that houses a collection of books and other materials | - |
| (noun) a collection of literary documents or records kept for reference or borrowing | - |
| (noun) (computing) a collection of standard programs and subroutines that are stored and available for immediate use | Synonyms: program library, subroutine library |
| libration | (noun) (astronomy) a real or apparent slow oscillation of a moon or satellite | - |
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| librettist | (noun) author of words to be set to music in an opera or operetta | - |
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| libretto | (noun) the words of an opera or musical play | - |
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