Open, honest, and direct in speech or writing, especially when dealing with unpalatable matters. adjective
She gave a frank assessment of the situation.
He was frank about his feelings towards the proposal.
A mark or signature on a letter or parcel indicating that postage has been paid or does not need to be paid. noun
The letter had a frank in the corner, showing it was sent from a government office.
He used a special machine to frank the envelopes before mailing them.
To mark a letter or parcel with an official mark or signature indicating that postage has been paid or does not need to be paid. verb
The company was authorized to frank their mail.
She franked the package before sending it out.