Adjective
1. not affected by a chemical substance (especially alcohol)
2. dignified and somber in manner or character and committed to keeping promises;
"a grave God-fearing man""a quiet sedate nature""as sober as a judge""a solemn promise""the judge was solemn as he pronounced sentence"3. lacking brightness or color; dull;
"drab faded curtains""sober Puritan gray""children in somber brown clothes"4. completely lacking in playfulness