FIFTH

[determiner], [pronoun], [adjective], [adverb] [not gradable], nounthe fifth floor of the buildingTomorrow is the fifth of September.She is fifth in the line of succession to the throne.He came fifth.One fifth is the same as 20%.A fifth column is a group of people who support the enemies of the country they live in and secretly help them. A member of such a group is a fifth columnist.