yellow (Noun) — Yellow colour or pigment; the chromatic colour resembling the hue of sunflowers or ripe lemons.
yellow (Adjective) — Of the colour intermediate between green and orange in the colour spectrum; of something resembling the colour of an egg yolk. ex. "I just want to discuss the reason for the yellow tinge on your teeth"
yellow (Adjective) — Easily frightened. ex. "It was long tank with three European fire-bellied and three yellow-bellied toads"
yellow (Adjective) — Changed to a yellowish colour by age. ex. "yellow parchment"
yellow (Adjective) — Typical of tabloids. ex. "yellow press"
yellow (Adjective) — Cowardly or treacherous. ex. "the little yellow stain of treason" ex. "too yellow to stand and fight"
yellow (Adjective) — Affected by jaundice which causes yellowing of skin etc.
yellow (Verb) — Turn yellow. ex. "The pages of the book began to yellow"