Meaning of the word "overnight express" in English

What does "overnight express" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

overnight express

US /ˌoʊ.vɚ.naɪt ɪkˈspres/
UK /ˌəʊ.və.naɪt ɪkˈspres/
"overnight express" picture

Noun

a delivery service that guarantees the arrival of a package or letter by the next day

Example:
I sent the documents via overnight express to ensure they arrive tomorrow.
The cost of overnight express is much higher than standard shipping.