frank
/fɹæŋk/
noun
Meaning
Free postage, a right exercised by governments (usually with definite article).
The notice on an envelope where a stamp would normally be found.
verb
Meaning
To place a frank on an envelope.
To exempt from charge for postage, as a letter, package, or packet, etc.
To send by public conveyance free of expense.
adjective
Meaning
Honest, especially in a manner that seems slightly blunt; candid; not reserved or disguised.
"May I be frank with you?"
Unmistakable, clinically obvious, self-evident
"The research probes whether treating pre-diabetes with metformin can prevent progression to frank diabetes."
Unbounded by restrictions, limitations, etc.; free.
Liberal; generous; profuse.
Unrestrained; loose; licentious.