the state or quality of being ample, esp. as to breadth or width; largeness; greatness of extent.

large or full measure; abundance; copiousness.

mental range, scope, or capacity.

Physics . the absolute value of the maximum displacement from a zero value during one period of an oscillation.

Electricity . the maximum deviation of an alternating current from its average value.

Astronomy . the arc of the horizon measured from the east or west point to the point where a vertical circle through a heavenly body would intersect the horizon.

Mathematics . argument ( def. 8b ) .

noun

magnitude , mass , size , volume , bigness , greatness , largeness , sizableness