Free ‧ post /ˈfriːpəʊst $ -poʊst/ BrE AmE noun [uncountable] trademark British English
an arrangement by which a company or organization pays the cost of letters that you send to it by post
Free ‧ post /ˈfriːpəʊst $ -poʊst/ BrE AmE noun [uncountable] trademark British English
an arrangement by which a company or organization pays the cost of letters that you send to it by post
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012