adj

• (of skin) Yellowish.
  "Jesu Maria, what a deal of brine Hath wash’d thy sallow cheeks for Rosaline!"
• (of skin) Yellowish.
  "The girls are mostly Slavic-pretty, long-limbed with high cheekbones, sallow skin and green eyes. They are the closest thing to supermodels that Mulhuddart has ever seen."
• (of a person) Having skin (especially on the face) of a sickly pale colour.
  "Time is jealous of you, and wars against your lilies and your roses. You will become sallow, and hollow-cheeked, and dull-eyed."
• (of objects or dim light) Having a similar pale, yellowish colour.
  "The terrible descriptions were so real and vivid, that the sallow pages seemed to turn red with gore […]"

verb

• (intransitive) To become sallow.
  "The tan of his sunburnt face and hands contrasted sadly with the sallowing skin of the girl-wife, who, despite his care, was sinking under her task of son-bearing."
• (transitive) To cause (someone or something) to become sallow.
  "1835, Fanny Kemble (as Frances Anne Butler), Journal, London: John Murray, Volume 1, entry for 15 September, 1832, p. 105, footnote, The climate of this country is the scape-goat upon which all ill looks and ill health of the ladies is laid; but while they are brought up as effeminately as they are, take as little exercise, live in rooms like ovens during the winter, and marry as early as they do, it will appear evident that many causes combine with an extremely variable climate, to sallow their complexions, and destroy their constitutions."