1. Plural of bluebook; small booklets with blue covers used for written examinations, especially in schools and universities.
Usage: Common in U.S. educational contexts; Often used in academic settings for essay exams
2. Plural of bluebook; official government publications or reports, typically bound in blue covers.
Usage: Formal/administrative usage; Chiefly British
3. Plural of bluebook; reference guides or directories, especially those listing names, addresses, or other information.
Usage: Dated usage; Historical reference materials

Examples

• The professor handed out bluebooks before the final exam.
• Students filled in their bluebooks with essay responses during the test.
• The library keeps copies of historical bluebooks from government agencies.
• She purchased a pack of bluebooks from the campus bookstore.
• The bluebooks contained detailed information about local businesses and residents.