Definition

1. Adjective:
   • Being the ordinal number corresponding to the cardinal number four hundred: Denoting position or order in a sequence, specifically the position following the three hundred and ninety-ninth.
   • Constituting one of four hundred equal parts: Used to describe a fraction where something is divided into four hundred equal parts.

Usage Examples

• Adjective (Ordinal Position):
  • She celebrated her four-hundredth day at the company.
  • The museum is displaying artifacts from the four-hundredth anniversary of the city's founding.
• Adjective (Fractional Part):
  • A four-hundredth of a second can be critical in an Olympic race.
  • The interest rate was reduced by four-hundredths of a percent.

Advanced Usage

• "the four-hundredth" (Noun Phrase): When used with the definite article, it can function as a noun phrase referring to the specific item in the 400th position or the fractional amount.
  • He was the four-hundredth to cross the finish line.
  • Only a four-hundredth of the original sample remained.

Variants and Related Words

• Four hundred (n): The cardinal number 400.
  • The book has four hundred pages.
• Four-hundredthly (adv): A rarely used adverb form meaning in the four-hundredth place (e.g., in a list).
  • The item is listed four-hundredthly in the catalog.

Synonyms

• 400th: The numeric symbol for the ordinal.
• Ordinal for 400: A descriptive synonym.

Notes on Meaning

• Primary Meaning: The primary use is as an ordinal adjective (e.g., the visitor).
• Fractional Meaning: It is also correctly used to express the fraction 1/400. This is a standard use for ordinal numbers (e.g., a is 1/100, a is 1/400).

Adjective

1. the ordinal number of four hundred in counting order