1) Age of many college students 2) Being one more than eighteen 3) Cardinal 4) College age 5) Dartboard score 6) Drinking age in Ontario 7) Eighth prime number 8) Impossible cribbage hand 9) It barely misses a score 10) Johnny unitas wore it 11) Last teens year 12) Leader of this century 13) Legal drinking age in BC 1) Xix 
• (a.) Nine and ten; eighteen and one more; one less than twenty; as, nineteen months. • (n.) The number greater than eighteen by a unit; the sum of ten and nine; nineteen units or objects. • (n.) A symbol for nineteen units, as 19 or xix. • (n.) The number greater than eighteen by a unit; the sum of ten and nine; nineteen units...
Nine'teen` adjective [ Anglo-Saxon nigont...ne , nigont...ne . See Nine , and Ten .] Nine and ten; eighteen and one more; one less than twenty; as, nineteen months. Nine'teen` noun 1. The number greater than eighteen by a unit; the sum of ten and nine; nineteen units or objects. 2. A symbol for nineteen units, as 19 or xix. 
[adj] - being one more than eighteen 2. [n] - the cardinal number that is the sum of eighteen and one
19 adjective being one more than eighteen