行っていらっしゃい: alternative form of いってらっしゃい (itterasshai)

see you later (said by a person staying, a stock phrase required by the Japanese etiquette, lit.: (after) going, come back)

(rare) a female given name

to have a dream

Kyūjitai form of 悪夢 (“nightmare”)

(idiomatic) sweet dreams!

Revealing that the entirety of a fictional story was all part of a dream the protagonist had; the "it was all a dream" ending.

lucid dream

lewd dream

daydream