noun

• (countable) The amount of time that some being has been alive, or that some thing has been in existence, as measured from its birth or origin until the present or until some other given reference point. (Often measured in number of years; alternatively in months, days, hours, etc.; see also the usage notes)
  ""What is the age of your oldest child?" — "He's ten." (ten years old)"
• (uncountable) The state of being old; the latter part of life.
  "Feel awfully about Scott... It was a terrible thing for him to love youth so much that he jumped straight from youth to senility without going through manhood. The minute he felt youth going he was frightened again and thought there was nothing between youth and age."
• (countable) Any particular stage of life.
  "the age of infancy"
• (countable) The time of life at which some particular power or capacity is understood to become vested.
  "the age of consent; the age of discretion"

verb

• (intransitive) To grow aged; to become old or older; to show marks of age.
  "He grew fat as he aged."
• (intransitive) To grow aged; to become old or older; to show marks of age.
  "His prediction that we didn't stand a chance hasn't aged well, now that we've won the cup."
• (transitive) To cause to grow old; to impart the characteristics of age to.
  "Grief ages us."
• (transitive) To cause to grow old; to impart the characteristics of age to.
  "We age the whiskey for five years."

noun

• (biochemistry) Initialism of advanced glycation end-product.
• (biochemistry) Initialism of agarose gel electrophoresis.
• (organic chemistry) Initialism of allyl glycidyl ether.
• (medicine, underwater diving) Initialism of arterial gas embolism.