(dated) An extremely polite person.

(Canada, idiomatic, euphemistic) Sexual activity.

(medicine) polyostotic sclerosing histiocytosis, a rare disease characterized by the abnormal multiplication of histiocytes.

(mineralogy) An orthorhombic-dipyramidal mineral containing aluminum, antimony, boron, iron, magnesium, and oxygen.

(mineralogy) A variety of feldspar.

(Southern US, nonstandard) Alternative form of chest of drawers

A person who supports G. K. Chesterton, especially in his theology.

Of or relating to G. K. Chesterton (1874–1936), English writer and lay theologian.

Someone who acts in a sophisticated, aristocratic manner, reminiscent of the fourth Earl of Chesterfield.

In the style of the fourth Earl of Chesterfield, marked by brilliance, wit, and elegance in writing, and aristocratic assurance in life