Definitions

1. noun

a small book or board with a piece of parchment or paper on it, used in the past as a primer for children to learn reading and writing

“The old museum exhibited an ancient hornbook with handwritten notes.”

2. noun

a wooden or leather-covered board with a removable piece of parchment or paper, used in the Middle Ages for teaching Latin and other subjects

“The medieval scholar studied with the aid of a hornbook to learn Latin phrases.”

3. noun

a device with a horn-shaped soundbox, used for producing a loud, clear sound

“The musician held a hornbook to amplify her trumpet sound.”