Free from the influence of intoxicating liquors; not drunk; unintoxicated.Habitually temperate in the use of liquor; not given to the use of strong or much drink.Temperate in general character or habit; free from excess; avoiding extremes; moderate.Guided or tempered by reason; rational; sensible; sane; sound; dispassionate; commonplace.Free from violence or tumult: serene; calm; tranquil; self-controlled.Modest; demure; sedate; staid; dignified; serious; grave; solemn.Plain or simple in color; somber; dull.Little; small; mean; poor; weak.= Syn. 3–5. Cool, collected, unimpassioned, steady, staid, somber. Sober differs from the words compared under grave in expressing the absence of exhilaration or excitement, whether physical, mental, or spiritual, whether beneficial or harmful.To make sober; free from intoxication.To mitigate; assuage; soften; restrain.To make serious, grave, or sad: often followed by down.To become sober, in any sense of the word.