a unit or its symbol that forms part of a system of counting and calculating, and that represents an amount or position in a series: You can write numbers in words, such as six, seven, and eight, or with …

a number of. A collection of persons or things; several. For example, A number of tours are available, or We've visited a number of times. This idiom often is modified by an adjective giving some idea of …

A number of definition is - more than two but fewer than many : several. How to use a number of in a sentence.

“Numbers rule all things.”Pythagoras 580 – 500 B.C.E. Plato called the study of number symbolism “the highest level of knowledge”. Pythagoras believed numbers had souls, as well as magical powers.. The Pythagoreans divided the numbers into two groups: odd and even, male and female, light and dark etc.

Arithmomancy, also called arithmancy, from the Greek arithmos (“number”) and manteia (“divination”), was practiced by the ancient Greeks, Chaldeans, and Hebrews; its successor is numerology. In these forms of number mysticism the letters of an alphabet are assigned numbers by some rule, typically A = 1, B = 2,…, Z = 26, or its equivalent. Words become numbers when their letter values are added together.

Sl. to damage or harm someone or something. The teacher did a number on the whole class by giving them a pop quiz. Tom did a number on Mary when he went out with Ann. See also: number, on. McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.