The cardinal number occurring after eighteen and before twenty, represented in Roman numerals as XIX and in Arabic numerals as 19. It is the last/largest of the "teens".

plural of nineteen

(rare) The property of being nineteen in age or number.

The decade consisting of the years 1900 through 1909. / The century consisting of the years 1900 through 1999.

The start of the twentieth hour of the day on the 24-hour clock i.e. 19:00. / The number one thousand nine hundred. / The year 1900.

(informal) very quickly; rapidly

(cribbage, humorous) A hand of cards that scores no points.

plural of nineteen hand

A society characterized by rigid government control enforced through propaganda and intensive surveillance.

plural of nineteenth