to send off or away with speed, as a messenger, telegram, body of troops, etc.
2.
to dismiss (a person), as after an audience.
3.
to put to death; kill: The spy was promptly dispatched.
4.
to transact or dispose of (a matter) promptly or speedily.
–verb (used without object)
5.
Archaic. to hasten; be quick.
–noun
6.
the sending off of a messenger, letter, etc., to a destination.
7.
the act of putting to death; killing; execution.
8.
prompt or speedy transaction, as of business.
9.
expeditious performance; promptness or speed: Proceed with all possible dispatch.
10.
Commerce.
a.
a method of effecting a speedy delivery of goods, money, etc.
b.
a conveyance or organization for the expeditious transmission of goods, money, etc.
11.
a written message sent with speed.
12.
an official communication sent by special messenger.
13.
Journalism. a news story transmitted to a newspaper, wire service, or the like, by one of its reporters, or by a wire service to a newspaper or other news agency.
—Idiom
14.
mentioned in dispatches, British. honored by being named in official military reports for special bravery or acts of service.
Origin: 1510–20; < It dispacciare to hasten, speed, or < Sp despachar both ult. < OF despeechier to unshackle, equiv. to des-dis-1+ -peechier < LL -pedicāre to shackle; see impeach
des·patch (dĭ-spāch') v.
& n. Variant of dispatch.
dis·patch also des·patch (dĭ-spāch') tr.v.
dis·patched also des·patched, dis·patch·ing also des·patch·ing, dis·patch·es also des·patch·es
To relegate to a specific destination or send on specific business. See Synonyms at send1.
To complete, transact, or dispose of promptly.
To eat up (food); finish off (a dish or meal).
To put to death summarily.
n.
The act of sending off, as to a specific destination.
Dismissal or rejection of something regarded as unimportant or unworthy of consideration: "[his] breezy dispatch of another Establishment fiction writer"(Christopher Hitchens).
The act of putting to death.
Speed in performance or movement. See Synonyms at haste.
also (dĭs'pāch')
A written message, particularly an official communication, sent with speed.
An important message sent by a diplomat or an officer in the armed forces.
also (dĭs'pāch') A news item sent to a news organization, as by a correspondent.
An organization or conveyance for delivering goods.
[Spanish despachar or Italian dispacciare, both probably ultimately from Old Provençal empachar, to impede, from Vulgar Latin *impāctāre, frequentative of Latin impingere, to dash against; see impinge.]
[di-spach] 
