sweven

n.

[AS. swefen sleep, dream; akin to swebban, swefian, to put to sleep, to kill. √176. See Somnolent.]
A vision seen in sleep; a dream. [Obs.] Wycliff (Acts ii. 17).

I defy both sweven and dream.

Chaucer.

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(SWEV-uhn)

noun
Dream; vision.

Etymology
From Old English swefn (sleep, dream, vision).]

Usage
"[The queen] went in to the Sultan and assured him that their daughter had suffered during all her wedding-night from swevens and nightmare." — The Arabian Nights (translated by Richard Francis Burton); 1885.

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archaic  a dream, vision