Definition

1. Noun:

   • The cardinal number that is the sum of nineteen and one: The number represented by the numeral 20.
   • A United States bill worth 20 dollars: A banknote with a monetary value of twenty dollars.

2. Adjective:

   • Denoting a quantity consisting of 20 items or units: Used to describe a group or amount totaling twenty.

Usage Examples

• Noun (Number):
  • Twenty is an even number.
  • The answer to the equation is twenty.
• Noun (Currency):
  • Can you break a twenty for me?
  • I paid with a twenty-dollar bill.
• Adjective:
  • She has twenty books on the shelf.
  • The meeting lasted twenty minutes.

Advanced Usage

• "The twenties": Refers to the years from 20 to 29 in a century or in a person's life.
  • He was born in the twenties. (Refers to the 1920s)
  • She is in her twenties. (Refers to her age being between 20 and 29)
• "Twenty-twenty hindsight": Perfect understanding of an event after it has happened.
  • With twenty-twenty hindsight, I should have invested in that company.

Variants and Related Words

• Twentieth (adj., n.): Constituting number twenty in a sequence; the ordinal form.
  • This is the twentieth edition of the book.
• Twentyfold (adj., adv.): Twenty times as great or as numerous.
  • The investment saw a twentyfold increase.

Synonyms

• Score (n.): An archaic term for twenty.
  • "Four score and seven years ago..." (87 years ago)

Related Phrases

• Twenty-four seven (24/7): All the time, constantly.
  • The convenience store is open twenty-four seven.
• Twenty questions: A parlour game where one player thinks of an object and others ask up to twenty yes/no questions to identify it.
  • Let's play a round of twenty questions.

Adjective

1. denoting a quantity consisting of 20 items or units

Noun

1. a United States bill worth 20 dollars
2. the cardinal number that is the sum of nineteen and one