1the length of time that a person has lived or a thing has existed:he died from a heart attack at the age of 51 he must be nearly 40 years of age a particular stage in someone’s life:children of primary school age [mass noun] the state of being old:fine wine improves with age
2a distinct period of history:an age of technological growth Geology a division of time that is a subdivision of an epoch, corresponding to a stage in chronostratigraphy.
) British informal a very long time:I haven’t seen her for ages
grow old or older:the tiredness we feel as we age [with object] cause to appear old or older:he even tried ageing the painting with a spoonful of coffee (with reference to an alcoholic drink, cheese, etc.) mature or allow to mature: [no object]:the wine ages in open vats or casks [with object]:a cheese that has been aged for four months [with object] determine how old (something) is:we didn’t have a clue how to age these animals
1old enough to be able or expected to do something:the sons are of an age to marry 2(of two or more people or things) of a similar age:the children all seemed of an age