1) Alice Cooper classic 2) Being one more than seventeen 3) Big rig wheel total 4) Cardinal 5) Draftable 6) Exclusively Anglo word 7) Exclusively Saxon word 8) Finale figure for a golfer 9) Hole number 10) Important age 11) Majority figure 12) Number of wheels on a semi 13) Of age 14) Old enough to vote 1) Nineandnine 2) Xviii 
• (a.) Eight and ten; as, eighteen pounds. • (n.) A symbol denoting eighteen units, as 18 or xviii. • (n.) The number greater by a unit than seventeen; eighteen units or objects.
Eight'een` (ā'tēn`) adjective [ Anglo-Saxon eahtatȳne , eahtatēne . See Eight , and Ten , and confer Eighty .] Eight and ten; as, eighteen pounds. Eight'een` noun 1. The number greater by a unit than seventeen; eighteen units or objects. 2. A symbol denoting eighteen units, as 18 or xviii. 
[adj] - being one more than seventeen 2. [n] - the cardinal number that is the sum of seventeen and one
18 adjective being one more than seventeen
a cardinal number, ten plus eight. · a symbol for this number, as 18 or XVIII. · a set of this many persons or things.