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of, giving, or containing :
an advisory letter from a stockbroker.
having the power or duty to :
an advisory council.
a report on existing or predicted conditions, often with for dealing with them:
an investment advisory.
an announcement or bulletin that serves to and usually warn the public, as of some potential hazard:
a health advisory; a travelers’ advisory.
an announcement from the U.S. National Weather Service to keep the public informed about the progress of a potentially dangerous weather condition:
hurricane advisory; tornado advisory.
Compare (def 3), (def 20).
Contemporary Examples

And if he is re-elected, the House advisory rules prohibiting him from voting no longer apply.
The Felon Who Wouldn’t Leave Congress Ben Jacobs, David Freedlander December 22, 2014

Günter Grass, Joan Didion, William Kennedy, Gay Talese, and Doris Kearns Goodwin are all part of the advisory committee.
Honoring Mailer’s Legacy The Daily Beast October 17, 2009

Full disclosure: my wife, Margaret Hoover, is on the advisory council of GOProud.
The GOP’s Gay Face-Off John Avlon September 17, 2010

Expanding internationally; BabyCenter is now in 18 countries, using local editors and advisory boards.
The Web’s Supermom Cait Murphy July 23, 2009

Lowrie is now on the advisory board of the American Conservative Union.
The Campaign Whisperers Jill Lawrence October 12, 2011

Historical Examples

I think that was one of the reasons that actuated the advisory board.
Report of the Committee Appointed to Investigate the Railroad Riots in July, 1877 Various

Moreover, there was to be an advisory Council elected by popular vote.
The Philippine Islands John Foreman

A feature of the university organization is the institution of a woman’s advisory committee co-operating with the council.
Appletons’ Popular Science Monthly, June 1899 Various

The parental influence, then, must be indirect and advisory.
Searchlights on Health: Light on Dark Corners B.G. Jefferis

The advisory board under the act of 16th July, 1862, did not recommend him for further promotion.
The Papers And Writings Of Abraham Lincoln, Volume Six Abraham Lincoln

adjective
giving advice; empowered to make recommendations: an advisory body
noun (pl) -ries
a statement issued to give advice, recommendations, or a warning: a travel advisory
a person or organization with an advisory function: the Prime Minister’s media advisory
adj.

1778; see advise + -ory. The noun meaning “weather warning” is from 1931.