(uncountable) The state or quality or characteristic of being red. / (countable, uncountable) A red discoloration.

plural of redness

(nautical) Describing the condition in which two sea-going ships travelling in opposite directions pass each other on their port sides, making their red navigation lights face each other.

Acronym of reverse electrodialysis.

(no longer productive) A suffix forming nouns of condition or state.

plural of Red

Liverpool F.C.

A nickname given to someone who has or had red hair.

A Communist. / A supporter of a sports team who wears red as part of their kit.

Communist