1) Delivered free 2) Emily footed the bill 3) Like some envelopes 4) Not requiring stamps 5) Paid 6) Paid in advance 7) Prepaid 8) Requiring no stamps 9) Stamped 10) Used especially of mail 1) Paid 2) Prepaid 
• (a.) Having the postage prepaid, as a letter.
Post'paid` adjective Having the postage prepaid, as a letter. 
[adj] - used especially of mail
prepaid adjective used especially of mail; paid in advance