Etymology The literal sense reflects the archetype of stone: it is usually cold to the touch and often quite cold. The figurative senses emphasize the high degree of coldness or of certainty.
1
Idiomatic Very cold (literally); lacking any semblance of warmth.
Near-synonyms: ice-cold, cold as ice, icy, freezing cold, frigid, cold as a well-digger's arse; see also Thesaurus:cold
I forgot to turn on the burner under the soup and found it sitting there, still stone cold, twenty minutes later.
2
Idiomatic, Of persons or their behavior Lacking emotion or compassion.
"A hike on Thursday looks a stone cold certainty," Howard Archer, chief UK economist at Global Insight, said.2006 November 6, Philip Thornton, “Interest rate rise a 'stone-cold certainty' despite industry plea”, in The Independent:
Etymology The literal sense reflects the archetype of stone: it is usually cold to the touch and often quite cold. The figurative senses emphasize the high degree of coldness or of certainty.
1
Idiomatic, Usually Certainly; definitely; obviously.
It is stone cold guaranteed that that guy will get his clock cleaned if he shows up here today.
stone-cold
adj
1
Completely cold.
By the time I returned to my desk, my tea was stone-cold.
2
Without emotion.
He was a stone-cold killer: he didn't flinch as he took the shot.
3
Absolute; incomparable.
With an ace-high flush on an unpaired board, he had the stone-cold nuts.