The Collaborative International Dictionary of English v.0.48:
Express \Ex*press"\, n. [Cf. F. expr[`e]s a messenger.]
1. A clear image or representation; an expression; a plain
The only remanent express of Christ's sacrifice on
earth. --Jer. Taylor.
2. A messenger sent on a special errand; a courier; hence, a
regular and fast conveyance; commonly, a company or system
for the prompt and safe transportation of merchandise or
3. An express office.
She charged him . . . to ask at the express if
anything came up from town. --E. E. Hale.
4. That which is sent by an express messenger or message.
[Obs.] --Eikon Basilike.
5. a railway train or bus for transporting passengers or
goods with speed and punctuality; a train or bus that does
not stop at certain stations. Contrasted to local; as,
take the express to get there faster.
Syn: express train. [PJC]
Express office, an office where packages for an express are
received or delivered.
Express train, a railway train (such as a subway train)
that does not stop at certain stations, but only at
stations designated express stops.