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

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

Before middle age, the two main vision disorders are myopia and hyperopia, or nearsightedness and farsightedness. — E. Tammy Kim, New Yorker, 15 Aug. 2026

Klotho crests in youth before settling in adulthood and dwindling in middle age. — Mark Ellwood, Robb Report, 9 Aug. 2026

The research, published Wednesday in the journal Neurology Open Access, found that people who avoid three vascular risk factors in middle age — high blood pressure, diabetes and smoking — had about 13 more dementia-free years. — Lily Alvino, NBC news, 7 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