alt

¹ American  

[alt] / ælt /

adjective

1. high.

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noun

1. in alt, in the first octave above the treble staff.

alt- ² American  

1. variant of alti- before a vowel.

   altazimuth.

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alt- ³ American  

1. a combining form of alternative, used in compound words describing a nontraditional or unconventional version within a genre or category, often something provocative, subversive, or innovative: the alt-right movement; writers of alt-lit;

   alt-country bands;

   the alt-right movement;

   alt-weeklies;

   writers of alt-lit;

   quinoa and other alt-grains.

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alt. ⁴ American  

abbreviation

1. alteration.

2. alternate.

3. altitude.

4. alto.

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alt British  

/ ælt /

adjective

1. (esp of vocal music) high in pitch

2. of or relating to the octave commencing with the G above the top line of the treble staff

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noun

1. in the octave directly above the treble staff

Etymology

Origin of alt¹

1525–35; < Provençal < Latin altum, noun use of neuter of altus high

Origin of alt-³

First recorded in 1985–90; from the use of the prefix alt- in Usenet, to denote newsgroups with unconventional discussion topics

Example Sentences

Other alt managers aren’t as dependent on their leader.

From Barron's • Mar. 2, 2026

Malinin was among those in the crowd who gave Liu - the alt girl with her iconic halo hair and lip piercing - a standing ovation as she wrote herself into Olympic folklore.

From BBC • Feb. 19, 2026

Blue Owl stock, at $16.31, has fallen 26% year to date, more than any of its alt firm peers, which signals either the risk of falling rates and weakening credit or a buying opportunity.

From Barron's • Oct. 24, 2025

The funniest part about posting it was deciding the alt text for the image.

From Slate • Jun. 11, 2025

Some alt rock was blaring from her paint-covered Bose docking system.

From "The Last Olympian" by Rick Riordan