What is the meaning of aging?

noun

• Acquiring desirable qualities by being left undisturbed for some time.
  • synonyms: ripening, ageing
• The organic process of growing older and showing the effects of increasing age.
  • synonyms: ageing, senescence

verb

• Begin to seem older; get older.
  • usage: "The death of his wife caused him to age fast"
  • synonyms: age
• Grow old or older.
  • usage: "She aged gracefully"; "we age every day-what a depressing thought"; "Young men senesce"
  • synonyms: senesce, age, get on, mature, maturate
• Make older.
  • usage: "The death of his child aged him tremendously"
  • synonyms: age

adjective

• Growing old.
  • synonyms: ageing, senescent