adverb
- with great speed; as quickly as possible
Usage: somewhat formal or literary
Examples
- The messenger rode posthaste to deliver the urgent news.
- When she heard about the emergency, she left posthaste.
- The doctor arrived posthaste after receiving the call.
- We must depart posthaste if we want to catch the train.
- The soldiers marched posthaste to reinforce the garrison.
- She packed her bags and left posthaste.