Available Definitions:
1) superl. - Temperate in the use of spirituous liquors; habitually temperate; as, a sober man.
2) superl. - Not intoxicated or excited by spirituous liquors; as, the sot may at times be sober.
3) superl. - Not mad or insane; not wild, visionary, or heated with passion; exercising cool, dispassionate reason; self-controlled; self-possessed.
4) superl. - Not proceeding from, or attended with, passion; calm; as, sober judgment; a man in his sober senses.
5) superl. - Serious or subdued in demeanor, habit, appearance, or color; solemn; grave; sedate.
6) v. t. - To make sober.
7) v. i. - To become sober; -- often with down.