Definitions

1. noun

a tongue (especially one of the ancient tongues of Rome)

“The Latin and Greek languages are both part of the linguae that shaped the Roman Empire.”

2. genitive plural noun

of tongues (used as a title for a work on languages or linguistics)

“The book ‘Linguae’ is a comprehensive guide to the history of languages.”

3. dative and ablative plural noun

by or with tongues (used in certain poetic or archaic expressions)

“The people spoke with the linguae of the wise men.”