noun

• (US) The middle light in a set of three traffic lights, the lighting of which indicates that drivers should stop short of the intersection if it is safe to do so.
• (snooker) One of the color balls used in snooker, with a value of 2 points.
• (pocket billiards) One of two groups of object balls, or a ball from that group, as used in the principally British version of pool that makes use of unnumbered balls (the yellow(s) and red(s)); contrast stripes and solids in the originally American version with numbered balls).
• (sports) A yellow card.
  "Andrew Surman fired in what proved to be a 37th-minute winner before Forest's Paul Konchesky saw red late on. That second yellow for the loan signing came in stoppage time and did not affect the outcome of a game which Norwich dominated."

adj

• (informal) Lacking courage.
  "What you should be is not yellow at all. If you're supposed to sock somebody in the jaw, and you sort of feel like doing it, you should do it."
• (publishing, journalism) Characterized by sensationalism, lurid content, and doubtful accuracy.
  "The denizens of the gossipy world of the pink press, purple prose and yellow tabloids are shivering over disputed photographs of Princess Caroline of Monaco."
• (chiefly derogatory, offensive, ethnic slur, of the skin) Of a hue attributed to Far East Asians, especially the Chinese.
  "They were all tall and all handsome, though they varied in their degree of darkness of skin, some being as dark as Mahomed, and some as yellow as a Chinese."
• (chiefly derogatory, offensive, ethnic slur) Far East Asian (relating to Asian people).
  "Imagine that awful being, and you have a mental picture of Dr. Fu-Manchu, the yellow peril incarnate in one man."

verb

• (intransitive) To become yellow or yellower.
  "Then suddenly, with the least warning, the sky yellows and the Chergui blows in from the Sahara, stinging the eyes and choking with its sandy, sticky breath."
• (transitive) To make (something) yellow or yellower.

intj

• (BDSM, procedure word) Used to indicate that the speaker needs a temporary break from current sexual activity.