Wiktionary
n. (context legal English) An instance of robbery where the participants are armed, i.e. are carrying weapons.
WordNet
Usage examples of "armed robbery".
The French gangster Jacques Mesrine turned from fighting rebels in Algeria to armed robbery.
Breakenridge arrived to serve him with a warrant for armed robbery.
We only had to point out that the penalty for armed robbery and accessory to murder was the gallows, but that we were prepared to do a deal and he started to gush.
An armed robbery-homicide suspect named Raymond Douglas Nash was renting a garage down the street--the place was checked for prints and bloodstains.
There was always work in the armed robbery line for a man who looked like a businessman or a bookkeeper or a general manager or whatever in the office type the job might require.
He fled the city following a hold-up but was returned and convicted of armed robbery.
No one at the Club Cockatoo, from the manager on down, had ever considered the possibility of an armed robbery by experienced professionals.
But then starts relaxing when he finds out that he did hard time for armed robbery, illegal weapons possession and attempted murder, spraying blood like paint.
I'm sure you can understand that our customers would not wish to deal with someone who served time in the penitentiary for armed robbery and attempted murder.