lunar day

1. 1.

   the period of time taken for the moon to make one full rotation on its axis (about 27.3 sidereal days)

   Broaderday

Questions about lunar day

What does lunar day mean?

lunar day means "the period of time taken for the moon to make one full rotation on its axis (about 27.3 sidereal days)".

Is lunar day a common word?

lunar day is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.