complete or total (used as an intensifier--typically when stressing how bad something is)
Perfectly still and silent, and not even fallen back in her chair, she sat under his hand, utterly insensible; with her eyes open and fixed upon him, and with that last expression looking as if it were carved or branded into her forehead.
Such vapouring, combined with the extravagant plots of Monseigneur for the restoration of a state of things that had utterly exhausted itself, and worn out Heaven and earth as well as itself, was hard to be endured without some remonstrance by any sane man who knew the truth.
Lost, utterly lost!
There are no more uses of "utter" identified with this meaning, but check unspecified meaning below.
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She suffered utter devastation when her child died in the accident.
He formed this speech with his lips many times before he could utter it.
His hands released her as he uttered this cry, and went up to his white hair, which they tore in a frenzy.
The young gentleman uttered this exultant sound with mysterious significance.
My dear Mr. Lorry, it is because I am a Frenchman born, that the thought (which I did not mean to utter here, however) has passed through my mind often.
"You have no idea how such an apprehension weighs on the sufferer’s mind, and how difficult—how almost impossible—it is, for him to force himself to utter a word upon the topic that oppresses him."
The old man uttered an irrepressible cry.
No sooner did he face her, than Miss Pross uttered a scream, and clapped her hands.
He had not previously uttered a word.
They continued to be uttered in their regular succession, with the cry, ’My husband, my father, and my brother!’ the counting up to twelve, and ’Hush!’
Instantly Madame Defarge’s knife was in her girdle; the drum was beating in the streets, as if it and a drummer had flown together by magic; and The Vengeance, uttering terrific shrieks, and flinging her arms about her head like all the forty Furies at once, was tearing from house to house, rousing the women.
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Her eyes were dilated and wild, and she constantly uttered piercing shrieks, and repeated the words, ’My husband, my father, and my brother!’ and then counted up to twelve, and said, ’Hush!’
But, she uttered no sound; and so strong was the voice within her, representing that it was she of all the world who must uphold him in his misery and not augment it, that it quickly raised her, even from that shock.