All 6 Uses

philanthropy
in
The Lost Symbol
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The fifty-eight-year-old philanthropist, historian, and scientist had taken Langdon under his wing nearly thirty years ago, in many ways filling the void left by Langdon's father's death.†
Chpt 1-2

philanthropist = someone who helps others -- especially by donating money to worthy causes
As a sophomore, Langdon had been required to attend an evening guest lecture by the well-known young historian and philanthropist.†
Chpt 3-4
A Mason with family money, interested in philanthropy and ancient mythology?†
Chpt 21-22 *

philanthropy = helping others; or an organization that does so
The aim is that you use this money to build a life of productivity, prosperity, and philanthropy.†
Chpt 61-62
He could imagine no "order" less ominous sounding than a fraternity of philanthropists who wore little red fezzes and marched in parades.†
Chpt 99-100
Langdon exited the bathroom and wound his way along the curved wall of the Hall of Honor—a gracefully arched passageway, lined with portraits of accomplished Masons ....U.S. presidents, philanthropists, luminaries, and other influential Americans.†
Chpt 125-126

Definitions:

(1) (philanthropy)
helping others -- especially donating money to worthy causes; or an organization that does so
(2) (meaning too rare to warrant focus)