Definition of "night-walker" [night-walker]

• One who walks in his sleep; a somnambulist. (noun)
• One who roves about in the night for evil purposes; a nocturnal vagrant. (noun)
• A prostitute who walks the streets at night. (noun)

The Century Dictionary (Public Domain)

• "Cheta, all thy labour is meerely lost, because heere is no entrance allowed for thee; therefore return to the place from whence thou camest, that all thy friends may Judge of thy behaviour, and know what a night-walker thou art become."
• "The night-walker moved on steadily, as if sure of his purpose; yet Conan wondered that he seemed to be heading for the blank end of the vast, vaulted storeroom."
• "A woman convicted of being a common night-walker was committed to prison -- probably the Tun, on Cornhill -- and thence she was led to Aldgate with a hood of rayed cloth on her head and a white wand in her hand."