sober

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Not intoxicated or affected by the use of alcohol or drugs.
• adjective Abstaining from or habitually abstemious in the use of alcoholic drink or other intoxicants.
• adjective Straightforward and serious; not exaggerated, emotional, or silly.
• adjective Serious or staid in character or conduct: synonym: serious.
• adjective Plain or subdued, as in decoration.
• transitive & intransitive verb To make or become sober.

from The Century Dictionary.

• 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.

from the GNU version of the Collaborative International Dictionary of English.

• intransitive verb To become sober; -- often with down.
• adjective Temperate in the use of spirituous liquors; habitually temperate.
• adjective Not intoxicated or excited by spirituous liquors.
• adjective Not mad or insane; not wild, visionary, or heated with passion; exercising cool, dispassionate reason; self-controlled; self-possessed.
• adjective Not proceeding from, or attended with, passion; calm
• adjective Serious or subdued in demeanor, habit, appearance, or color; solemn; grave; sedate.
• transitive verb To make sober.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective not drunk; not intoxicated
• adjective not given to excessive drinking of alcohol;
• adjective in character; moderate; realistic; serious; not playful; not passionate; cool; self-controlled
• adjective dull; not bright or colorful;
• verb To make or become sober.
• verb To overcome or lose a state of intoxication.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective completely lacking in playfulness
• verb become sober after excessive alcohol consumption
• verb cause to become sober
• verb become more realistic
• adjective not affected by a chemical substance (especially alcohol)
• adjective lacking brightness or color; dull
• adjective dignified and somber in manner or character and committed to keeping promises