one hundred eighty
Definition
- Adjective:
- Being ten more than one hundred seventy: The number 180; denoting a quantity that is exactly ten greater than 170.
Usage
- The word "one hundred eighty" is a cardinal number used as an adjective to describe a count, measurement, or position in a sequence. It is typically written with numerals as "180" in most contexts.
- It is used attributively (before a noun) or predicatively (after a linking verb like "is").
Examples
- Attributive use (before a noun):
- The total cost was one hundred eighty dollars.
- The angle measured one hundred eighty degrees.
- Predicative use (after a linking verb):
- The final score was one hundred eighty.
- The number of participants is one hundred eighty.
Advanced Usage
- In Mathematics and Geometry: Commonly used to describe a straight angle, which is 180 degrees.
- A semicircle subtends an angle of one hundred eighty degrees at the center.
- In Formal or Legal Writing: Often spelled out for clarity in contracts or documents.
- The term shall not exceed one hundred eighty (180) days.
Variants and Related Words
- 180: The standard numeral form.
- A hundred and eighty: A common, less formal spoken variant, especially in British English.
- CLXXX: The Roman numeral representation.
- One-eighty (informal/slang): Can refer to a complete reversal in direction or opinion (derived from the 180-degree turn).
Synonyms
- A hundred and eighty
- Eighteen tens (rare, mathematical)
Notes on Different Meanings
- As a cardinal number, "one hundred eighty" has only one primary numerical meaning. Its informal variant "one-eighty" has developed an idiomatic meaning unrelated to the exact quantity.
Related Idioms and Phrases
- Do a one-eighty / Pull a one-eighty: To make a complete reversal in direction, opinion, or policy.
- After hearing the evidence, the committee did a complete one-eighty on the issue.
- Note: This idiom uses the informal, hyphenated form "one-eighty," which is derived from the number.
Adjective
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being ten more than one hundred seventy
