Meaning of the word sourdough in English

What does sourdough mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

sourdough

US /ˈsaʊr.doʊ/
UK /ˈsaʊə.dəʊ/

Noun

a mixture of flour and water that is left to ferment (= change in a chemical process) and then used to make bread:

Example:
sourdough bread