The Collaborative International Dictionary of English v.0.48:
Kohl \Kohl\, n. [See Alcohol.] A mixture of soot and other ingredients, used by Egyptian and other Eastern women to darken the edges of the eyelids. [1913 Webster]WordNet (r) 3.0 (2006):
kohl n 1: a cosmetic preparation used by women in Egypt and Arabia to darken the edges of their eyelids