Definitions

1. adjective

Having an unpleasantly sharp or acid taste; sour.

“The sourd milk spoiled in just a few hours.”

2. noun

A mixture of flour, water, and yeast, used as a starter for making sourdough bread.

“To make the perfect sourd, you need to let it ferment for 24 hours.”

3. noun

A person with a sour or unpleasant disposition.

“The sourd in the office always seemed to find something to complain about.”