80
Học thuậtThân thiện
Definition
Adjective:
- Being ten more than seventy; equal to eight times ten. This is the cardinal number 80, used to describe a quantity or position in a sequence.
Noun:
- The cardinal number that is the product of ten and eight. This is the number itself, represented by the numeral 80.
Usage Examples
- Adjective:
- She bought eighty apples for the event. (She bought a quantity of apples totaling 80.)
- He finished in eightieth place. (This uses the ordinal form derived from 80 to indicate position.)
- Noun:
- Eighty is a multiple of ten. (Here, 'eighty' is the subject, referring to the number itself.)
- The number on the jersey was eighty. (The jersey displayed the numeral 80.)
Advanced Usage
- "In one's eighties": Referring to an age between 80 and 89 years old.
- My grandfather is in his eighties and still very active.
- "The eighties" (often capitalized as 'the Eighties'): Referring to the decade from 1980 to 1989.
- The music of the eighties is making a comeback.
Variants and Related Words
- Eightieth (adj., n.): The ordinal form of 80. As an adjective, it means "constituting number eighty in a sequence." As a noun, it means "one of eighty equal parts."
- This is the eightieth anniversary. (Adjective)
- She received an eightieth of the total. (Noun)
- LXXX: The Roman numeral for 80.
Synonyms
- Fourscore (archaic): An old-fashioned term meaning eighty.
- "Fourscore and seven years ago..." (From Abraham Lincoln's Gettysburg Address).
Related Phrases
- Eighty-six (v., slang): To discard, eject, or refuse service to someone. To cancel or get rid of something.
- The bartender decided to eighty-six the troublesome patron.
- We had to eighty-six the special; we ran out of ingredients.
- Eighty-twenty rule (Pareto Principle): A principle stating that roughly 80% of effects come from 20% of causes.
- In business, the eighty-twenty rule often applies to sales from key clients.
Adjective
- being ten more than seventy
Noun
- the cardinal number that is the product of ten and eight