Meaning of READER in English

noun Date: before 12th century 1. one that reads, one appointed to read to others: as, lector , one chosen to read aloud selected material in a Christian Science church or society, c. proof~ , one who evaluates manuscripts, one who reads periodical literature to discover items of special interest or value, an employee who reads and records the indications of meters, a teacher's assistant who reads and marks student papers, one who reads lectures or expounds subjects to students, 3. a device for projecting a readable image of a transparency, a unit that scans material recorded (as on punch cards) for storage or computation, 4. a book for instruction and practice especially in reading, anthology

Merriam Webster. Explanatory English dictionary Merriam Webster.      Толковый словарь английского языка Мерриам-Уэбстер.