express parcel delivery
Refers to a fast delivery service for parcels, often used in postal or courier contexts.
Please send this package by express delivery.
If you use express delivery, it will arrive by tomorrow.
宅急便 is a trademark of Yamato Transport for door-to-door parcel delivery, whereas 特急便 is a generic term for express delivery service.
Compound of 特急 (limited express, special express) and 便 (service, mail, flight).