1.  multiplicity(n = noun.attribute) - the property of being multiple;
is a kind of magnitude
Derived form adjective multiple₁

2.  multiplicity(n = noun.attribute) numerosity, numerousness - a large number;
is a kind of figure, number
has particulars: multitudinousness

   The quality of being multiple, manifold, or various; a state of being many; a multitude; as, a multiplicity of thoughts or objects. South. [1913 Webster]

multiplicity, n. (pl. -ies)
1 manifold variety.
2 (foll. by of) a great number.

Etymology:
LL multiplicitas (as MULTIPLEX)

N  multitude, numerous, numerosity, numerality, multiplicity, profusion, legion, host, great number, large number, round number, enormous number, a quantity, numbers, array, sight, army, sea, galaxy, scores, peck, bushel, shoal, swarm, draught, bevy, cloud, flock, herd, drove, flight, covey, hive, brood, litter, farrow, fry, nest, crowd, lots, all in the world and his wife, greater number, majority, multiplication, multiple, many, several, sundry, divers, various, not a few, Briarean, a hundred, a thousand, a myriad, a million, a quadrillion, a nonillion, a thousand and one, some ten or a dozen, some forty or fifty, half a dozen, half a hundred, very many, full many, ever so many, numerous, numerose, profuse, in profusion, manifold, multiplied, multitudinous, multiple, multinominal, teeming, populous, peopled, crowded, thick, studded, galore, thick coming, many more, more than one can tell, a world of, no end of, no end to, cum multis aliis, thick as hops, thick as hail, plenty as blackberries, numerous as the stars in the firmament, numerous as the sands on the seashore, numerous as the hairs on the head, and what not, and heaven knows what, endless, their name is 'legion', acervatim, en foule, many- headed multitude, numerous as glittering gems of morning dew, vel prece vel pretio.