Middle English
US /ˌmɪd.əl ˈɪŋ.ɡlɪʃ/
UK /ˌmɪd.əl ˈɪŋ.ɡlɪʃ/

1.
the English language as it was spoken and written between about 1150 and 1500
:
•
Chaucer's works are written in Middle English.
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Studying Middle English helps understand the evolution of the language.