(Christianity) The night office of the Christian liturgy of the Hours, such as is performed in monasteries. / (Christianity) A portion of the psalter used during nocturns.

An ejaculation or orgasm while asleep, often accompanied by an erotic dream.

plural of nocturnal emission

(medicine, psychology, psychiatry) A state of agitation or confusion, especially in elderly patients suffering from Alzheimer's disease or other forms of dementia, which begins daily at nightfall and which is alleviated by daylight.

plural of nocturnal delirium

plural of nocturnal pollution

(obsolete) nocturnal emission

(astronomy) The arc of a circle described by the Sun, or a star, in the night.

(astronomy) Archaic form of nocturnal arc.

plural of nocturnal arch