unleaded
Definition
- Adjective:
- Not containing tetraethyl lead: Describes a type of fuel, especially gasoline/petrol, that does not have lead compounds added to it. This is the most common usage.
- Not having leads between lines: A specific printing term referring to text set without extra spacing (lead strips) between lines of type. This usage is now rare.
Usage
- The primary modern use of "unleaded" is as an adjective to describe fuel. It is most commonly used in the fixed phrase "unleaded gasoline" (or "unleaded petrol" in British English).
- It is used in contrast to "leaded" fuel. For example, at a gas station, you might see pumps labeled "unleaded" or "regular unleaded."
Examples
- Adjective:
- Most modern cars are designed to run on unleaded fuel.
- The mechanic confirmed that I should only use unleaded gasoline in my vehicle.
- For environmental and health reasons, leaded gasoline has been largely replaced by unleaded.
Advanced Usage
- "Unleaded" as a noun (informal): In casual conversation, "unleaded" can function as a shortened noun referring to unleaded gasoline.
- "Fill it up with unleaded, please."
- Metaphorical use: Rarely, it can be used metaphorically to describe something pure or unadulterated, though this is not standard.
- His argument was an unleaded version of the truth. (This is a creative, non-standard usage.)
Variants and Related Words
- Lead (verb/noun): The heavy metal whose compound, tetraethyl lead, was once a common fuel additive.
- Leaded (adjective): Containing lead; specifically describing the old type of gasoline.
- Premium Unleaded / Super Unleaded: Marketing terms for higher-octane grades of unleaded gasoline.
- Unleaded coffee: An informal and humorous term for decaffeinated coffee, playing on the fuel analogy.
Synonyms
- Lead-free: A more general synonym, especially for other products like paint or pipes.
- Non-leaded: A less common variant with the same meaning.
Antonyms
- Leaded: Specifically for fuel that contains tetraethyl lead.
Related Phrases/Idioms
- "Regular unleaded": The standard, lowest-octane grade of unleaded gasoline available at most stations.
- "Switch to unleaded": A common phrase from the late 20th century encouraging the use of unleaded fuel for environmental protection.
Adjective
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not having leads between the lines
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not treated with lead
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unleaded gasoline
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