is a type of (narrower)
a basic or essential attribute shared by all members of a class
"a study of the physical properties of atomic particles"
is an attribute of
having reached full natural growth or development
"a mature cell"
is an attribute of
not yet mature
is an attribute of
of long duration; not new
"old tradition"; "old house"; "old wine"; "old country"; "old friendships"; "old money"
is an attribute of
not of long duration; having just (or relatively recently) come into being or been made or acquired or discovered
"a new law"; "new cars"; "a new comet"; "a new friend"; "a new year"; "the New World"
is an attribute of
(used especially of persons) having lived for a relatively long time or attained a specific age
"his mother is very old"; "a ripe old age"; "how old are you?"
is an attribute of
(used of living things especially persons) in an early period of life or development or growth
"young people"