back number 
noun British
1An issue of a periodical earlier than the current one.Also, partly moth-eaten back numbers of forgotten magazines of the 1950s or even earlier may catch your eye....
- But when I last visited the shop, the owner directed me to a pile of back numbers of a journal that was neither dead nor Indian.
- He had seen his exhibition advertised in a back number of the magazine and used one of his last two remaining postage stamps to send him photographs of his figures in pastel.
1.1 informal A person or thing seen as outdated or past their prime.Though he showed flashes of the old brilliance, fashionable opinion increasingly considered him obsolete, a back number from a bygone era....
- Not much past sixty, he began to regard and carry himself as an old man, not at all displeased to be considered a back number.
- It would be stupid to write him off as a back number on the strength of that Kempton run alone.
- at one time
- atonic
- atony
- atop
- atopic
- atopy
- -ator
- at (or by) the hands (or hand) of
- at (or in) a pinch
- at (or in) close quarters
- at (or in) law
- at (or in) one fell swoop
- at (or on) short (or a moment's) notice
- at (or on) the heels of
- at (or to) heel
- infructescence
- in fruit
- infula
- in full
- in full career
- in full cry
- in full face
- in full flight
- in full flow
- (in) full rig