sober-v; 2 Senses

Sense Number 1: become more realistic

He sobered up after thinking about the consequeces of his plan.
The child's death sobered the town.
John sobered when faced with a tough decision.

VerbNet: amuse-31.1,other_cos-45.4
FrameNet: Experiencer_obj
PropBank: NP

Sense Number 2: become sober after excessive alcohol consumption

Leave him in bed until he sobers up.
The coffee sobered him up.
It took a while for Paul to sober up after his bachelor party.

VerbNet: NM
FrameNet: NM
PropBank: sober.01,sober.02