Definition of "iron collar" []

• An instrument of execution for execution by strangulation (noun)

WordNet. Princeton University. 2010.

• "I have worn the iron collar of the serf about my neck in cold climes; and I have loved princesses of royal houses in the tropic - warmed and sun-scented night, where black slaves fanned the sultry air with fans of peacock plumes, while from afar, across the palms and fountains, drifted the roaring of lions and the cries of jackals."
• "He laid by his Khyber knife and pulled off his puggaree — he was a Pathan, though, with that close-cropped skull, hawk face, and grizzled beard, for all he grunted "Slainte" as he lifted his tumbler, first clamping his neck in that strange iron collar I'd seen in the after-noon — dear God, was it only twelve hours ago?"