old age 
noun [mass noun]
1The later part of normal life: loneliness affects many people in old age...
- All this was in complete contrast to the manner of most people in their old age.
- There will also be an incentive for people to move from England to Scotland for free personal care in their old age.
- We all know that everyone grows with a lot of features carried over from childhood to old age!
1.1The state of being old: old age itself is not a disease...
- The late Norman MacCaig once told him about old age withering his talents.
- The exhibition presents Whistler's women in the three ages of childhood, adulthood and old age.
- Most plantations are now mature and many will be felled or will deteriorate due to old age during the next decade.
- olfactory lobe
- olfactory nerve
- olfactory tract
- olfactronic
- olfactronically
- olfactronics
- oliban
- olibane
- olibanum
- olid
- olifant
- olifant melkbosch
- olifants melkbos
- olifantsmelkbos
- oligaemia
- oligaemic
- oligandrous
- oliganthous
- oligarch
- oligarchal
- oligarchic
- oligarchical
- oligarchically
- oligarchise
- oligarchism