It means "with the utmost speed".
I have received your message, in which you wrote that you are beseiged, hold on and I will send help posthaste.
Posthaste
Posthaste
The answer is What is posthaste?
posthaste
It was original music writen by the Posthaste music library company
Post, as in postcard and posthaste.
There are several synonyms for directly. Immediately, right away, and posthaste are three of them. An antonym for directly would be indirectly.
The word you asked about is actually two words, from the Latin: post haste. It isn't very common these days, but it means "as quickly as possible." And it does not have a verb form.
The answer is post, to make postcard, postbox, postcode, postbag, and posthaste.
The category was Word and Phase OriginsThe clue is "Meaning Rapidly this term began in England referring to the speed with which the mail was delivered"The answer is What is posthaste?
Fast. (quickly). Post haste means - as fast as possible. The expression has its origins in the early days of the UK postal service when special transport services were laid on for delivering the post (mail) on time and without delay.