Definition of old age noun from the Oxford Advanced American Dictionary

 

old age

 noun
noun
 
[uncountable]
 
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the time of your life when you are old Old age can bring many problems. He lived alone in his old age. Topic CollocationsThe Ages of Lifechildhood/youth be born (and raised) in New York; into a wealthy/middle-class family have a happy/an unhappy/a tough childhood grow up in a musical family/in an orphanage/on a farm be/grow up an only child (= with no brothers or sisters) reach/hit/enter/go through adolescence/puberty be in your teens/early twenties/mid-twenties/late twenties undergo/experience physical/psychological changes give in to/succumb to/resist peer pressure assert your independence/individualityadulthood leave home graduate from school/college go to work (at the age of 21) get/find a job/partner be/get engaged/married have a wife/husband/mortgage/steady job settle down and have kids/start a family begin/start/launch/build a career (in politics/science/the music industry) prove (to be)/represent/mark/reach a (major) turning point in your life/career reach/be well into/settle into middle age have/suffer/go through a midlife crisis take/consider early retirement approach/announce/enjoy your retirementold age see/spend time with your grandchildren take up/pursue/develop a hobby get/receive/draw/collect/live on a pension approach/save for/die of old age live to a ripe old age reach the grand old age of 102/23 (often humorous) be/become/be getting/be going senile (often humorous) die (peacefully)/pass away in your sleep/after a brief illness
See the Oxford Advanced Learner's Dictionary entry: old age