The period or night each month (or in a specified month) during which the moon appears with its whole disc illuminated.

(a) The time when the new moon appears; (also Astronomy) the time at which the moon is in conjunction with the sun and is not visible from the…

Of the moon: Periodical decrease in apparent size (see wane, v. 2); the half of the lunar month in which this takes place.

In full new of the moon. The time at which the moon is new (see new moon, n.). Now rare.

As a measure of time. A fourth part of a lunar month. Also: the state or astronomical position of the moon when halfway between new and full moon (fir…

A full moon; the time of a full moon. Also in figurative context.

In ancient Greek and Jewish history: the time of the new moon, the beginning of the lunar month. Also: the festival held at that time; = Rosh Chodesh…

The time of full moon.

= interlunation, n.

The period characterized by the waning of the moon, esp. regarded as a favourable, or unfavourable, time for various (usually agricultural)…

= neomenia, n.

the time at or near new moon when there is no moonlight; cf. dark moon, n.

Astronomy. the part of the lunar month during which the moon is actually visible; also called illuminative month. Obsolete.

The time at or near new moon when there is no moonlight; = dark of the moon n. at dark, n. phrases; (also) the moon when not illuminated by the sun.

A full moon; the time of a full moon; = plenilune, n.

With ordinal numeral: a particular day after a new moon. Obsolete.

The period between the old and new moon; figurative a blank or dark interval.

The passage of the moon from one quarter to another. Also: one of the moon's quarters (cf. quarter, n. 2c) (rare).