thirty-one

Thân thiện

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

Definition

Adjective: Being one more than thirty; the cardinal number that follows thirty and precedes thirty-two. It is represented by the Arabic numerals 31 or the Roman numeral XXXI.

Usage

The word "thirty-one" is used as a determiner or modifier to specify a quantity, position, or identifier that is exactly one unit greater than thirty. * It is primarily used to describe a countable number of items. * It can denote a position in a sequence (e.g., the thirty-first item). * It functions as a single lexical unit representing the specific integer.

Examples

• As a determiner/modifier:
  • She has thirty-one unread messages in her inbox.
  • The recipe requires thirty-one different ingredients.
  • Chapter thirty-one is the most exciting part of the book.
• In arithmetic and identification:
  • Twenty plus eleven equals thirty-one.
  • His jersey number is thirty-one.

Advanced Usage

• In compound adjectives: When used before a noun to form a compound adjective, it is typically hyphenated (e.g., a thirty-one-day month, a thirty-one-point lead).
• "Thirty-one" as a nominal: The number itself can be used as a noun.
  • Thirty-one is a prime number.

Variants and Related Words

• 31st / thirty-first (adj., n.): The ordinal number corresponding to thirty-one, indicating position in a sequence.
  • Example: Today is her thirty-first birthday. She finished in thirty-first place.
• XXXI: The Roman numeral for thirty-one.

Synonyms

• 31 (numeral form)
• XXXI (Roman numeral form)

Related Phrases and Idioms

• "Thirty-one flavors": A phrase famously associated with the Baskin-Robbins ice cream chain, suggesting a wide variety of choices. It is a proprietary idiom rather than a general English one.
  • Example: The new policy offers a thirty-one flavors approach to benefits, with many options to choose from.

Học thuật

Adjective

1. being one more than thirty

Từ đồng nghĩa

• 31
• xxxi