1.sb. or sth. that is old has lived or existed for a long time
2.used for talking about the age of sb. or sth.
3.used for saying that sb. is not as young as other people
4.showing the understanding, wisdom, or behavior that results from long experience of life
5.belonging to an earlier period of sth. such as sb's life
6.familiar from past experience
7.existing before one or all of the other stages, forms, or instances of something, especially a particular language
8.annoyingly familiar, especially as a result of repetition
9.having existed or been used for a long time, especially if showing wear or age
10.used in a negative way about something that is not useful or in good condition any more
11.used for showing that you like sb. and care about them
12.used as an intensifier
14.reduced through erosion and weathering
15.[Geology]characterized by slower moving water and broad, flat floodplains
-year- olds