"lone actor" is a correct and commonly used phrase in written English.
It is used to describe someone or something operating or acting independently or alone, without the help of others. For example, "The lone actor used her own resources to solve the problem."
When fringe theatre gets parodied, the image is often a lone actor droning on about some hobbyhorse subject.
"Lone actor terrorists are perceived as presenting acute challenges for law enforcement practitioners in detection and disruption," the report says.
But he did not acknowledge being part of an extremist group and some terrorism experts came to view him as a self-radicalized, lone actor.
The report, which is released in updated form on Wednesday, says: "Rightwing extremists represent a substantial aspect of the lone actor threat and must not be overlooked".
In general, Israel has tried to fashion itself as part of an international coalition on Iran, rather than a lone actor.
There is the issue, of course, about lone actor versus some form of more concerted effort by a number of actors.
By the show's end four lone actors have become a revolutionary legion.
Lone actors are much harder to detect – something al-Qaida appears determined to exploit.
"My research on foreign fighters and lone actors suggests that radicalisation to violence is being overlooked, and we need to revisit that component of radicalisation.
In a detailed study of 171 cases, Mr. Pate found that two-thirds were perpetrated by "lone actors with motivations all over the map".
They are "lone actors" only in terms of the actual organisation and execution of a terrorist attack; their world view is shared by a significant number of people.
