postage

• POS: Noun
• HYPHEN: post=age

CIDE DICTIONARY

postage, n. 

 The price established by law to be paid for the conveyance of a letter or other mailable matter by a public post.  [1913 Webster]

Postage stamp, a government stamp required to be put upon articles sent by mail in payment of the postage, esp. an adhesive stamp issued and sold for that purpose.

OXFORD DICTIONARY

postage, n. the amount charged for sending a letter etc. by post, usu. prepaid in the form of a stamp ({pound}25 including postage & packing).

Idiom

postage meter US a franking-machine. postage stamp an official stamp affixed to or imprinted on a letter etc. indicating the amount of postage paid.