a fatty substance consisting of a mixture of glycerides, including stearic, palmitic, and oleic acids and extracted chiefly from the suet of sheep and cattle: used for making soap, candles, food, etc
—vb
2.
(tr) to cover or smear with tallow
[Old English tælg, a dye; related to Middle Low German talch tallow, Dutch talk, Icelandic tólg]