(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.

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

Alternative spelling of redd

Acronym of reverse electrodialysis.

(countable and uncountable) Any of a range of colours having the longest wavelengths, 670 nm, of the visible spectrum; a primary additive colour for transmitted light: the colour obtained by subtracting green and blue from white light using magenta and yellow filters; the colour of blood, ripe strawberries, etc.

(archaic) simple past tense and past participle of rede

(idiomatic, accounting) Having net losses; in debt.

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

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

Communist