Definitions of red:

• noun:   the quality or state of the chromatic color resembling the hue of blood
• noun:   a tributary of the Mississippi River that flows eastward from Texas along the southern boundary of Oklahoma and through Louisiana
• noun:   the amount by which the cost of a business exceeds its revenue

  Example: "The company operated in the red last year"

• noun:   emotionally charged terms used to refer to extreme radicals or revolutionaries
• adjective:   red with or characterized by blood

  Example: "Waving our red weapons o'er our heads- Shakespeare"

• adjective:   having any of numerous bright or strong colors reminiscent of the color of blood or cherries or tomatoes or rubies
• adjective:   characterized by violence or bloodshed

  Example: "Convulsed with red rage- Hudson Strode"

• adjective:   (especially of the face) reddened or suffused with or as if with blood from emotion or exertion

  Example: "Turned red from exertion"

• name:  A surname (rare: 1 in 50000 families; popularity rank in the U.S.: #6840)