'moral border' is correct and usable in written English.
It can be used to describe the line between right and wrong, or between moral thinking and immoral thinking. For example: "We all have our own moral borders that we do not cross."
The caressing, honeyed light in "Sin Nombre" beautifies and softens every ugly moment in this equivocating (inspirational yet hard-boiled) story about geographic and moral border crossings.
Civilization hasn't successfully drawn a moral border at the sanctity of human life itself, but because it needs to put some limit on human behavior, it has, apparently, taken a last stand at the dignity of corpses.
"Israel doesn't have moral borders," Mr. Moskovitz said.
However, he retained many characteristics of the western – standoffs between law officials and bounty hunters, protagonists living on geographical and moral borders – when his books moved east and into a different genre.
For hundreds of millions of persons, the ideas of Marx, as communicated by Lenin, had profound moral, even bordering on religious, significance.
In "Gumrah" he challenged an Indian society steeped, in his view, in shallow moral values bordering on hypocrisy, with a tale of marital infidelity in which a woman resumes an affair with a lover after her marriage.
These analyses amount to a subtle moral psychology, which borders on virtue ethics.
Visitors should exercise caution, check their moral qualms at the border and behave as polite guests.
To explore community knowledge, perceptions and attitudes towards health insurance and behaviors that border on moral hazards, 14 focus group discussions (FGDs) were conducted with various categories of people in the district.
Yet the evidence in the letters suggests that his political naïveté bordered on moral obtuseness.
Following the film's Cannes premiere, a French film technicians' union criticised him for his working methods, which it claimed were disorganised, unreasonable and bordering on "moral harassment".
