All 6 Uses of

sober

in

Crime and Punishment, by Dostoyevsky

Someone was standing stealthily close to the lock and just as he was doing on the outside was secretly listening within, and seemed to have her ear to the door....He moved a little on purpose and muttered something aloud that he might not have the appearance of hiding, then rang a third time, but quietly, soberly, and without impatience, Recalling it afterwards, that moment stood out in his mind vividly, distinctly, for ever; he could not make out how he had had such cunning, for his mind was as it were clouded at moments and he was almost unconscious of his body....An instant later he heard the latch unfastened.†
Chpt 1.6

soberly = in a serious manner

And at eight o'clock this morning'—that was the third day, you understand—'I saw Nikolay coming in, not sober, though not to say very drunk—he could understand what was said to him.†
Chpt 2.4 *

It was natural enough that a warm, open, simple-hearted, honest giant like Razumihin, who had never seen anyone like her and was not quite sober at the time, should lose his head immediately.†
Chpt 3.1

The morning that followed the fateful interview with Dounia and her mother brought sobering influences to bear on Pyotr Petrovitch.†
Chpt 5.1

Katerina Ivanovna was irritated too by the fact that hardly any of the lodgers invited had come to the funeral, except the Pole who had just managed to run into the cemetery, while to the memorial dinner the poorest and most insignificant of them had turned up, the wretched creatures, many of them not quite sober.†
Chpt 5.2

Definitions:

(1) (sober as in: Talk to me when your sober.)
not under the influence of alcohol
(2) (sober up as in: I need to sober up.)
to become less drunk or intoxicated
(3) (sobering as in: a sobering thought)
serious or calm (not silly or excited); or making one serious or less excited
(4) (meaning too rare to warrant focus)
More rarely, sober can refer to one who is rational rather than under the influence of extreme emotion. Also more rarely, it can reference that which is practical rather than fanciful -- such as "a more sober plan."