ultralight

American  

[uhl-truh-lahyt, uhl-truh-lahyt, uhl-truh-lahyt] / ˌʌl trəˈlaɪt, ˈʌl trəˌlaɪt, ˈʌl trəˌlaɪt /

adjective

1. extremely lightweight in comparison with others of its kind.

   a car with an ultralight engine.

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noun

1. something that is ultralight.

2. a small, light, inexpensive single-seat airplane that is essentially a motorized hang glider.

Etymology

Origin of ultralight

First recorded in 1970–75; ultra- + light ²

Example Sentences

These particles, called ultralight bosons, are predicted by some theories that go beyond the Standard Model of particle physics, which describes and classifies all known elementary particles.

From Science Daily • Oct. 30, 2025

To an amazing degree, the FAA relies on ultralight pilots’ judgment and sense of self preservation.

From The Wall Street Journal • Oct. 17, 2025

I wish I’d had this ultralight set instead.

From Los Angeles Times • Nov. 3, 2024

Those include “fuzzy” or “warm” dark matter, composed of hypothetical, ultralight particles called axions, and even a whole “dark sector” of invisible particles and forces that would create galaxies with a different footprint.

From New York Times • Jan. 26, 2024

Only the unique combination of the two of them could have produced the silk sleigh: a sleek, ultralight craft buoyed by ulola gas.

From "Strange the Dreamer" by Laini Taylor