'Middle-aged' definitions:
Definition of 'middle-aged'
(from WordNet)
adjective
Being roughly between 45 and 65 years old
Definition of 'Middle-aged'
From: GCIDE
- Middle-aged \Mid"dle-aged`\, a. Being about the middle of the ordinary age of man; early in the century, it was considered between 30 and 50 years old, but by the end of the 19th centruy it was considered as 40 to 60. [1913 Webster +PJC]