unleaded

American  

[uhn-led-id] / ʌnˈlɛd ɪd /

adjective

1. (of gasoline) containing no tetraethyllead; lead-free.

2. Printing. not separated or spaced with leads, as lines of type or printed matter.

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noun

1. an unleaded product, especially gasoline that contains no tetraethyllead.

unleaded British  

/ ʌnˈlɛdɪd /

adjective

1. (of petrol) containing a reduced amount of tetraethyl lead, in order to reduce environmental pollution

2. not covered or weighted with lead

3. printing (of lines of type, etc) not spaced or separated with leads; solid

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noun

1. petrol containing a reduced amount of tetraethyl lead

Etymology

Origin of unleaded

First recorded in 1605–15; un- ¹ + lead ² + -ed ³

Example Sentences

The average price of unleaded petrol has risen to 158.52p a litre, its highest level since the start of the Iran war, according to the RAC.

From BBC • May 19, 2026

The average national price for a gallon of regular unleaded gas was at $4.42 late Friday morning, according to GasBuddy.

From MarketWatch • May 1, 2026

Cinquegrana said that he expects drivers to change their behavior more dramatically as prices rise closer to $5—perhaps by switching from premium to regular unleaded, or by driving less.

From Barron's • Apr. 30, 2026

Average prices for regular unleaded gasoline rose 33% in March, while premium unleaded rose 30%, the ABS added.

From The Wall Street Journal • Apr. 29, 2026

He held that leading is no advantage to clearness, and that it would be better to print the same words on the page in a larger type unleaded.

From The Booklover and His Books by Koopman, Harry Lyman