To give (especially public) notice of (something); to announce publicly.
To provide public information about (a product, service etc.) in order to attract public awareness and increase sales.
In gin rummy, to discard a card of one's preferred suit so as to mislead the opponent into thinking you do not want it.
To provide information about a person or goods and services to influence others.
To hide something from view or from public knowledge, to try to keep something secret.