not intoxicated or drunk.

habitually temperate, esp. in the use of liquor.

quiet or sedate in demeanor, as persons.

marked by seriousness, gravity, solemnity, etc., as of demeanor, speech, etc.

a sober occasion.

subdued in tone, as color; not gay or showy, as clothes.

free from excess, extravagance, or exaggeration

sober facts.

showing self-control

sober restraint.

sane or rational

a sober solution to the problem.

to make or become sober

(often fol. by up

noun

abstinence , dryness , sobriety , teetotalism