a yellow colour similar to that of the element sulfur

(mineralogy) Alternative form of yellowcake / (cooking) Used other than figuratively or idiomatically: any yellow-colored cake.

(US) A traffic light, between the green light and the red light, indicating that vehicles may proceed with caution. / (idiomatic) Hesitance to proceed; limited approval or permission to proceed.

Icterus nigrogularis, of the New World. / Oriolus flavocinctus (green oriole), of New Guinea and northern Australia.

(snooker) The corner pocket on a snooker table that is nearest the yellow spot.

(sports) To show someone a yellow card

(idiomatic, soccer) To receive a yellow card.

(derogatory, racially offensive, sometimes capitalized) The alleged threat to Western nations by East Asians, especially Chinese or Japanese people, due to their vast population, non-Western cultures, or supposed antagonism to the West.

(chiefly US) A predatory wasp with alternating black and yellow stripes around the abdomen, usually of the genera Vespula or Dolichovespula.

(idiomatic) Journalism which is sensationalistic and of questionable accuracy and taste.