The phrase "warm water" refers to water that is not too hot or too cold, but at a comfortable temperature that feels nice when touched or used for various purposes. Full definition
To begin, place 1 1/2 cups of warm water in a mixing bowl, with 1 tablespoon of brown sugar and 2 teaspoons of kosher salt. (cosmopolitancornbread.com)
Surface wash in warm water with mild soap and rinse thoroughly. (diaperjunction.com)
Combine the miso with 1/4 cup warm water in a small container and whisk until smooth. (vegkitchen.com)