last quarter

1. 1.

   the last fourth of the Moon's period of revolution around the Earth

   Broaderhalf-moon

Questions about last quarter

What does last quarter mean?

last quarter means "the last fourth of the Moon's period of revolution around the Earth".

Is last quarter a common word?

last quarter is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.