aging — the length of time during which a being or thing has existed; length of life or existence to the time spoken of or referred to: trees of unknown age; His age is 20 years.
ageing — Someone or something that is ageing is becoming older and less healthy or efficient.
old — far advanced in the years of one's or its life: an old man; an old horse; an old tree.
aged — You use aged followed by a number to say how old someone is.
mature — complete in natural growth or development, as plant and animal forms: a mature rose bush.
senior — older or elder (designating the older of two men bearing the same name, as a father whose son is named after him, often written as Sr. or sr. following the name): I'd like to speak with the senior Mr. Hansen, please. I'm privileged to introduce Mr. Edward Andrew Hansen, Sr. Compare junior (def 1).
retired — withdrawn from or no longer occupied with one's business or profession: a retired banker.
ancient — Ancient means very old, or having existed for a long time.
gray — of a color between white and black; having a neutral hue.
been around — in a circle, ring, or the like; so as to surround a person, group, thing, etc.: The crowd gathered around.
declining — deteriorating gradually, as in quality, health, or character
hoary — gray or white with age: an old dog with a hoary muzzle.
olden — of or relating to the distant past or bygone times; ancient.
over the hill — a natural elevation of the earth's surface, smaller than a mountain.
venerable — commanding respect because of great age or impressive dignity; worthy of veneration or reverence, as because of high office or noble character: a venerable member of Congress.
