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

Origin of alt

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

Alt key


noun Computers.

either of two keys on a PC keyboard that is held down while pressing another key, as to perform a specific operation or type a special character.

Origin of Alt key

First recorded in 1980–85
Also called Alt


variant of alti- before a vowel: altazimuth.

alt. Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for alt

Contemporary Examples of alt

Historical Examples of alt

  • He was not beautiful, and his voice was three octaves above F in alt.

  • "'Alt, friends, while I 'as a look at you," said the sentry.

  • Whoever the war was between, and whatever it was about, Alt Breisach was bound to be in it.

    Three Men on the Bummel

    Jerome K. Jerome

  • "You whistled the octave of B. in alt," remarked Edith appreciatively.

    Dodo's Daughter

    E. F. Benson

  • It is only that in every human heart there is a chord that vibrates to C in alt.

    The Secret Life

    Elizabeth Bisland

British Dictionary definitions for alt



(esp of vocal music) high in pitch
of or relating to the octave commencing with the G above the top line of the treble staff


in alt in the octave directly above the treble staff

Word Origin for alt

C16: from Provençal, from Latin altus high, deep
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for alt




alanine aminotransferase
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.