noun, plural night·ies.
Origin of nightie
Examples from the Web for nighty
Historical Examples of nighty
He looked narrowly into the frank, engaging eyes of the boy in the nighty.Truxton King
George Barr McCutcheon
The whole matter appeared so painful to them I covered up the offending "nighty" with my dressing-gown, and coughed.Red Hair
And she took her little handkerchief out of the pocket of her nighty and began to wipe her eyes with it.The Wonderful Bed
I got to thinking of accidents, and I thought how disagreeable it would be to turn out into the snow in my nighty.Between The Dark And The Daylight
William Dean Howells
Here once on a warm night Holly had appeared in her 'nighty,' having had a bad dream, to have the clutch of it released.The Forsyte Saga, Complete
noun plural nighties
1871, short for nightgown; originally a children's word.