Sexagenarian
/ˌseksədʒəˈneriən/
Definition 1 of 1
Pro Tip 1/3Age Range
Use 'sexagenarian' to specify someone's age within the 60-69 bracket without stating the exact number. 
The club welcomes sexagenarians with a special discount.
Pro Tip 2/3Adjective Use
'Sexagenarian' can describe related nouns, like 'sexagenarian population' to mean people in their 60s. 
The survey focused on the sexagenarian demographic.
Pro Tip 3/3Neutral Connotation
The term 'sexagenarian' is neutral and factual, without any negative or positive bias. 
The park has many sexagenarian visitors on weekdays.