What is the meaning of Frank?

Honest, especially in a manner that seems slightly blunt; candid; not reserved or disguised.

Unmistakable, clinically obvious, self-evident.

Unbounded by restrictions, limitations, etc.; free.

Liberal; generous; profuse.

Unrestrained; loose; licentious.

Free postage, a right exercised by governments (usually with definite article).

The notice on an envelope where a stamp would normally be found.

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.

A hot dog or sausage.

The grey heron.

A pigsty.

To shut up in a frank or sty; to pen up; hence, to cram; to fatten.

Obsolete form of franc, former French coins, moneys of account, and currency.

franc (former currency of France and some other countries)

franc (any of several units of currency such as Swiss franc)

frank, candid, blunt, open-hearted

cheeky, brazen

franc

Frank (Frankish person)

frank

frank (coin)

franc (former unit of currency of Belgium)

franc (currency of the Comoros)

franc (former unit of currency of France)

franc (currency of Liechtenstein)

franc (former unit of currency of Luxembourg)

franc (former unit of currency of Monaco)

franc (currency of Switzerland)

Source: wiktionary.org