The act of stopping smoking behavior.
A process of ending dependence on nicotine, the addictive drug in tobacco products. Since nicotine is highly addictive, withdrawal from it is often unpleasant, causing an intense craving for cigarettes (or other tobacco products), difficulty concentrating, irritability, hunger, constipation, and trouble sleeping. Because tobacco use is the single greatest cause of disease and premature death in America today (over 430,000 deaths a year), doctors strongly encourage quitting smoking.