Wiktionary
n. the waning lunar phase half way between full moon and new moon.
WordNet
n. the last fourth of the moon's period of revolution around the Earth
Usage examples of "last quarter".
Adultery had dropped off a point and a third in the last quarter, down another point from the quarter before.
Old-style Communism was to blame, but in the last quarter century we've learned the lessons of history.
The moon was waning now into her last quarter, so there was less light, but the same kind of clouds raced across her face.
In the meantime, I need extracted reports of materials budgets for the Fleet from last quarter, training hours, by type, dragon-flight hours and total ship time at sea.
In the last quarter of the novel, they're separated: forever, they assume.
The last quarter of the Nineteenth Century was a troubled time, economically.
Thus the tale of the last quarter of the 19th century might be told exclusively through the lives of Carnegie, Gould, Rockefeller, Ford, and the rest.
During the last quarter of the century he taught theology with great distinction at the University of Paris.
She was in four classes last quarter, one of them your Intro Social section.
We've had to turn away customers for ordinary dinnerware because he shot the last quarter's budget on some Mexican piggy banks some equally enthusiastic importer stuck him with.