n 1 a  :  the part of life from birth to a given time <a child 10 years of >   b  :  the time or part of life at which some particular event, qualification, or capacity arises, occurs, or is lost <of reproductive >  < of first pregnancy>  - see MIDDLE AGE   c  :  an advanced stage of life  2  :  an individual's development measured in terms of the years requisite for like development of an average individual <a child of 7 with a mental of 10>  - see BINET AGE MENTAL AGE 
vb, aged  ag*ing  or  age*ing vi  :  to become old  :  show the effects or the characteristics of increasing age vt  :  to cause to become old .
 
 
 
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