A traveling-bag containing necessaries for the night.(noun)
The Century Dictionary (Public Domain)
Use "night-bag" in a sentence
"My imitation leather night-bag nestles above me in the overhead webbing."
"Back in the bedroom I emptied my stolen goods onto the bed, by which I mean the tapes and notepads and, obsessively tidy as I am, worried how best to dispose of Mr. Anderson's plastic night-bag until I remembered the waste bing in the kitchen."
"Obediently, I reach for my night-bag and prepare to watch my arse, but it was too late, we had landed."