1. the state of not being under the influence of alcohol or drugs
2. seriousness and solemnity of manner or behavior

Examples

• After years of addiction, he finally achieved sobriety.
• The program helps people maintain their sobriety.
• She celebrated five years of sobriety last month.
• The judge spoke with great sobriety about the case.
• The sobriety of the ceremony impressed all who attended.
• His sobriety in discussing the tragedy was appropriate.
• The meeting was conducted with proper sobriety.