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1. Lasting, open, or operating through the whole night
   "an overnight trip";
   - nightlong, all-night

1. During or for the length of one night
   "the fish marinates overnight"
    
2. Happening in a short time or with great speed
   "these solutions cannot be found overnight!"

1. Stay the night
    
2. [N. Amer] Send something for delivery the next day
   "We can overnight you the documents for signature"

1. An overnight stay, especially in a hotel or other lodging facility

Derived forms: overnighted, overnighting, overnights

See also: long

Encyclopedia: Overnight