An adage (; Latin: adagium) is a short, usually philosophical, but memorable saying which holds some important fact of experience that is considered true by many people, or that has gained some credibility through its long memetic use.

Advertising Age (or Ad Age) is a magazine, delivering news, analysis, and data on marketing and media. The magazine was started as a broadsheet newspaper in Chicago in 1930. Today, its content appears in a print weekly distributed around the world and on many electronic platforms, including: www.adage.com, daily e-mail newsletters called Ad Age Daily, Ad Age's Mediaworks and Ad Age Digital; weekly newsletters such as Madison & Vine (about branded entertainment) and Ad Age China; podcasts called Why It Matters and various videos. It also features a bookstore and a number of blogs, some created by the publication's editorial team, others, such as Small Agency Diary created by members of the Ad Age community. Simon Dumenco, the "Media Guy", is one of its columnists.