Second class post is the slower and cheaper way of sending mail. Send it second class post, second class post takes longer.
It aims at two or three working days and is what most ordinary post goes by. Second class post is not collected any less often, so the saving costs less time than people expect.
1nounsecond class postThe slower and cheaper way of sending mail.
“Christmas cards go second class post and still arrive.”
second class post is a service.
Practised in Bank & Post Office