eighty-one

Thân thiện

A child counts eighty-one colorful marbles on the floor.

Definition

Adjective: Being one more than eighty; the cardinal number equal to 80 + 1.

Usage

This word is used as a determiner or adjective to specify the quantity of eighty-one items or to denote the number itself. It follows the standard pattern for compound numbers from twenty-one to ninety-nine.

Examples

• The recipe calls for eighty-one chocolate chips.
• She scored eighty-one points in the basketball game.
• The temperature reached eighty-one degrees Fahrenheit.
• Eighty-one is a perfect square (9 x 9).

Advanced Usage

• As a nominal (noun): While primarily an adjective, it can function as a noun when referring to the number itself.
  • Eighty-one is an odd number.
• In sequences: Used in ordered lists or to indicate position in a series.
  • He lives at number eighty-one on Maple Street.
  • Turn to page eighty-one.

Variants and Related Words

• 81: The numeric form.
• LXXXI: The Roman numeral form.
• Four score and one: An archaic or literary phrasing (a 'score' is twenty).
• Eighty-first (81st): The ordinal number form, used to indicate position in a sequence.
  • She finished in eighty-first place.

Synonyms

• 81 (numeral)
• Four score and one (archaic)

Notes on Different Meanings

This word has only one core numerical meaning. It does not typically have idiomatic meanings or function as a phrasal verb.

Học thuật

Adjective

1. being one more than eighty

Từ đồng nghĩa

• 81
• lxxxi