Magnitude vs. Amplitude

By Jaxson

• Amplitude

The amplitude of a periodic variable is a measure of its change over a single period (such as time or spatial period). There are various definitions of amplitude (see below), which are all functions of the magnitude of the difference between the variable’s extreme values. In older texts the phase is sometimes called the amplitude.

Wikipedia
• Magnitude (noun)

The absolute or relative size, extent or importance of something.

• Magnitude (noun)

An order of magnitude.

• Magnitude (noun)

A number, assigned to something, such that it may be compared to others numerically

• Magnitude (noun)

Of a vector, the norm, most commonly, the two-norm.

• Magnitude (noun)

The apparent brightness of a star (on a negative, logarithmic scale); apparent magnitude

• Magnitude (noun)

A measure of the energy released by an earthquake (e.g. on the Richter scale).

• Amplitude (noun)

The measure of something’s size, especially in terms of width or breadth; largeness, magnitude.

• Amplitude (noun)

The maximum absolute value of the vertical component of a curve or function, especially one that is periodic.

• Amplitude (noun)

The maximum absolute value of some quantity that varies.

• Amplitude (noun)

The arc of the horizon between the true east or west point and the center of the sun, or a star, at its rising or setting. At the rising, the amplitude is eastern or ortive: at the setting, it is western, occiduous, or occasive. It is also northern or southern, when north or south of the equator.

• Amplitude (noun)

The arc of the horizon between the true east or west point and the foot of the vertical circle passing through any star or object.

• Amplitude (noun)

The horizontal line which measures the distance to which a projectile is thrown; the range.

Wiktionary