red

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The hue of the long-wave end of the visible spectrum, evoked in the human observer by radiant energy with wavelengths of approximately 630 to 750 nanometers; any of a group of colors that may vary in lightness and saturation and whose hue resembles that of blood; one of the additive or light primaries; one of the psychological primary hues.
• noun A pigment or dye having a red hue.
• noun Something that has a red hue.
• noun A Communist.
• noun A revolutionary activist.
• noun The condition of being in debt or operating at a loss.
• adjective Having a color resembling that of blood.
• adjective Reddish in color or having parts that are reddish in color.
• adjective Having a reddish or coppery skin color.
• adjective Often Offensive Of or being a Native American.
• adjective Having a ruddy or flushed complexion.
• adjective Relating to or being a red state.
• adjective Communist.

from The Century Dictionary.

• Of a bright, warm color resembling that of blood or of the highest part of the primary rainbow. See II.
• Ultra-radical; revolutionary; violent: from the use of a red flag as a revolutionary emblem: as, a red republican.
• A book containing the names of all the persons in the service of the state.
• The Peerage. See peerage, 3.
• Synonyms Flashing, claming, fiery, bloody.
• noun A color more or less resembling that of blood or the lower end of the spectrum.
• noun A red pigment.
• noun An object of a red color, as wine, gold, etc.
• noun Specifically, a red cent. See under I.
• noun A red republican (which see, under republican).
• noun plural The catamenial discharges; menses.
• A dialectal form of rid.
• noun In coal-mining, rubbish; attle; waste.
• noun A form of re- used before vowels.
• A semi-official publication issued quarterly in China, and there called the “Complete Book of the Girdle-wearers,” containing lists of all the officials and gentry of the country, together with details of place of birth, etc.
• noun In archery: The second and next to the innermost circle of the target, which is colored red.
• noun An arrow which hits this circle; a hit in the red. Such a hit counts 7 by the present method of scoring. In old archery the innermost circle was sometimes colored red.
• noun A chocolate-colored compound, C₁₂H_uO₇, found in cinchona-bark, and also formed when an ammoniacal solution of quinotannic acid stands exposed to the air.
• noun Same as azococcine, 1.
• noun Same as ponceau 3RB.
• To make red; redden.
• To put in order; tidy: often with up: as, to red up a house or one's self.
• To disentangle; clear; put a stop to, as a quarrel, by interference; adjust.
• To separate, as two combatants.
• noun The nest of a fish; a trench dug by a fish in which to spawn.
• noun An obsolete or dialectal form of read.
• noun A suffix of Anglo-Saxon origin, meaning ‘condition,’ ‘state,’ occurring in hatred, kindred (for *kinred), gossipred, etc. It is analogous to -hood, which has taken its place in a few instances, as in brotherhood, neighborhood.

from the GNU version of the Collaborative International Dictionary of English.

• imp. & p. p. of read.
• adjective Of the color of blood, or of a tint resembling that color; of the hue of that part of the rainbow, or of the solar spectrum, which is furthest from the violet part.
• adjective (Zoöl.) a beautiful butterfly (Vanessa Atalanta) common in both Europe and America. The front wings are crossed by a broad orange red band. The larva feeds on nettles. Called also Atalanta butterfly, and nettle butterfly.
• adjective (Zoöl.) A larger reddish ant (Formica sanguinea), native of Europe and America. It is one of the slave-making species.
• adjective (Min.) kermesite. See Kermes mineral (b), under Kermes.
• adjective (Bot.) an American tree (Fraxinus pubescens), smaller than the white ash, and less valuable for timber.
• adjective (Zoöl.) See Redfish (d).