noun. the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold.
1. Noun, singular or mass If the gold leaf is under 22 kt, or is synthetic, you may need to paint on an acrylic top coat. 2. Proper noun, singular Inputting the scientist's information into the equation for exponential growth or decay, y(t) = a__ekt, he has: