Real Dictionary

sallow
adjective: If a person has sallow skin, their skin, especially on their face, is a pale-yellowish colour and looks unhealthy.

sallow in American English 1
of a sickly, pale-yellow hue
adjective: of a sickly, yellowish color
transitive verb: to make sallow

sallow in American English 2
a kind of willow (Salix caprea) with large catkins of flowers which appear before the leaves
noun: any of several shrubby Old World willows, esp Salix atrocinerea or the pussy willow, S. caprea

sallow in British English 1
adjective: (esp of human skin) of an unhealthy pale or yellowish colour
verb: to make sallow

sallow in British English 2
noun: any of several small willow trees, esp the Eurasian Salix cinerea ( common sallow), which has large catkins that appear before the leaves