Old; having lived or existed long; having reached an advanced period of life: as, an aged man; an aged oak.Of the age of: as, a man aged forty years.Pertaining to or characteristic of old age.Synonyms Aged, Elderly, Old, Ancient. Old is the general word for being near to the natural end, or having nearly reached the usual period, of life: as, a cat is old at twelve years. Elderly is rather old, beginning to be old. Aged is very old. Ancient is so old as to seem to belong to a past age. (See other comparisons under ancient.)In geology, approaching peneplanation: said of the topography of a greatly denuded region.Of a horse, arrived at the age when the ‘pit’ or ‘mark’ on the front teeth has been obliterated by the gradual wearing away of the crown.