Alteration

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alteration

[‚ȯl·tə′rā·shən]
(graphic arts)
In printing composition, a change that is made in typeset copy.
(petrology)
A change in a rock's mineral composition.

Alteration

A term in the building code referring to any change in a structure which does not increase any of its exterior dimensions, or any modification in construction or grade of occupancy.

alteration

Construction in a building which may change the structural parts, mechanical equipment, or location of openings, but does not increase the overall area of dimensions of the building.
References in classic literature ?
That's my trouble," he answered in an altered tone.
When he alters other intervals (for example fifths) microtonally, he usually does so in the framework of common chords and a reference tone creating a third (sixth) with the altered tone or a prime (octave) is usually close by.
This is a good time to remind the student that the altered tone, (the raised seventh degree) in the harmonic form, came about because, over time, the human ear came to prefer the sound of the semitone occurring between degrees seven and eight, but minor key signatures do not reflect the altered seventh tone.