1. A custardlike food with a tart flavor, prepared from milk curdled by bacteria, especially lactobacillus bulgaricus and streptococcus thermophilus, and often sweetened or flavored with fruit.

1. A milk-based product thickened by a bacterium-aided curdling process, and sometimes mixed with fruit or other flavoring.
2. any similar product based on other substances (e.g. soy yogurt).

1. a custard-like food made from curdled milk