defines sauce as:
1. any preparation, usually liquid or semiliquid, eaten as a gravy or as a relish ccompanying food.
2. stewed fruit, often puréed and served as an accompaniment to meat, dessert, or other food: cranberry sauce.
3. something that adds piquance or zest.
4. Informal. impertinence; sauciness.
5. Slang. hard liquor (usually preceded by the): He's on the sauce again.
6. Archaic. garden vegetables eaten with meat.