Nineteen and Xix

Nineteen noun - The cardinal number that is the sum of eighteen and one.

Xix is a synonym for nineteen. In some cases you can use "Xix" instead the word "Nineteen" as an adjective or a noun.

Xix adjective - Being one more than eighteen.

Nineteen is a synonym for xix. You can use "Nineteen" instead the word "Xix" as a noun or an adjective.