EIGHTEEN

n. & adj. --n. 1 one more than seventeen, or eight more than ten; the product of two units and nine units. 2 a symbol for this (18, xviii, XVIII). 3 a size etc. denoted by eighteen. 4 a set or team of eighteen individuals. 5 (18) Brit. (of films) classified as suitable for persons of 18 years and over. --adj. that amount to eighteen. øøeighteenth adj. & n. [OE ehtatene, eaht-]