ˌMiddle ˈAges noun
the Middle Ages the period in European history between about 1100 and 1500 AD

[TahlilGaran] Dictionary of Contemporary English ▲

Middle Ages
noun
BAD: The history of the town dates back to the Middle Age.
GOOD: The history of the town dates back to the Middle Ages.

Usage Note:
middle age = the period in a person's life between youth and old age: 'People who live this type of life are lucky if they reach middle age.'
Middle Ages = the period in European history from about 1100 to 1500 AD: 'Life in the Middle Ages was very simple.'

[TahlilGaran] Dictionary of Common Errors ▲