Definition

1. Adjective:

   • Being ten more than eighty: The number 90 is the integer that follows 89 and precedes 91. It is equivalent to nine times ten.

2. Noun:

   • The cardinal number that is the product of ten and nine: The symbol or word representing the quantity of ninety units.

Usage Examples

• Adjective:
  • She is 90 years old. (She has lived for nine decades.)
  • The temperature reached 90 degrees. (The temperature was ten more than eighty degrees.)
• Noun:
  • A score of 90 is excellent. (The number ninety represents a high score.)
  • He counted to 90. (He recited numbers up to the cardinal number ninety.)

Advanced Usage

• As a milestone: Often used to denote significant anniversaries or ages.
  • They celebrated their 90th wedding anniversary. (They celebrated nine decades of marriage.)
• In approximate expressions: Used to indicate a large percentage or majority.
  • 90 percent of the work is complete. (The vast majority, specifically nine-tenths, of the task is done.)

Variants and Related Words

• Ninety (n, adj): The word form of the number 90.
  • Ninety people attended the event.
• Ninetieth (adj, n): Ordinal form for position 90 in a sequence.
  • This is the ninetieth day of the year.
• XC (n): The Roman numeral for 90.

Synonyms

• Four score and ten: An archaic term for ninety.
• Nine tens: A descriptive phrase for the quantity.

Related Phrases

• The Naughty Nineties: A historical idiom referring to the 1890s.
• Ninety-day wonder: A slang term, often historical, for a graduate of an accelerated officer training program.

Idioms

• Ninety-nine times out of a hundred: An idiom meaning almost always.
  • He is on time ninety-nine times out of a hundred.
• In the nineties: Can refer to a temperature range, a decade (e.g., 1990s), or an age range.
  • She was born in the nineties. (She was born in the 1990s.)

Adjective

1. being ten more than eighty

Noun

1. the cardinal number that is the product of ten and nine