middle age

noun

: the period of life from about 45 to about 64

middle-aged

ˌmi-dᵊl-ˈājd 

adjective

middle-ager

ˌmi-dᵊl-ˈā-jər 

noun

Examples of middle age in a Sentence

as our generation approaches middle age

The patient was in late middle age.

He feared the approach of middle age.

Recent Examples on the Web

Even people who carry the APOE4 gene, which increases the risk of later-in-life Alzheimer’s, still benefited from a healthier middle age. — Lauran Neergaard, Los Angeles Times, 15 Sep. 2026

High blood pressure, abnormal blood lipids, abdominal fat and impaired glucose regulation don’t suddenly materialize in middle age. — Paul McClure 23, New Atlas, 23 Aug. 2026

Visualizing Middle-Age Malaise Whitaker’s approach to middle age appears throughout the series. — Dana Feldman, Forbes.com, 17 Aug. 2026

The guests are millennial to middle age couples, mostly escaping LA or San Francisco! — Condé Nast, Condé Nast Traveler, 15 Aug. 2026

Word History

First Known Use

14th century, in the meaning defined above

Rhymes for middle age

• disengage
• interstage
• macrophage
• multistage
• alienage
• assuage
• backstage
• bocage
• downstage
• engage
• enrage
• leafage

Kids Definition

middle age

noun

: the period of life from about 45 to about 64

middle-aged

ˌmid-ᵊl-ˈājd

adjective

Medical Definition

middle age

noun

mid·​dle age ˌmid-ᵊl-ˈāj 

: the period of life from about 45 to about 64 years of age

middle-aged

ˌmid-ᵊl-ˈājd 

adjective