1. stays for one night, especially at a hotel or someone’s home
Usage: plural form

1. stays somewhere for one night
Usage: third person singular present
2. sends something by overnight delivery
Usage: third person singular present

Examples

• The hotel had twelve overnights last Tuesday.
• Business overnights increased during the conference season.
• She overnights at her grandmother’s house every weekend.
• The company overnights important documents to clients.
• He always overnights packages when they’re urgent.
• The resort tracks its overnights to measure occupancy rates.