abacus
noun
an object used for counting or doing simple calculations, consisting of a frame with small balls in a row
Click any word in a definition or example to find the entry for that word
noun
an object used for counting or doing simple calculations, consisting of a frame with small balls in a row
noun
a set of rules for solving problems or doing calculations, especially rules that a computer uses
noun
maths
an amount that is calculated by adding several numbers together and dividing the total by the original number of things you added togethernoun
maths
in mathematics, an expression that has two parts connected by the sign + or the sign –, for example 2x + 3y or x – 12noun
the counting of numbers backward, for example from ten to zero, before something important happens
noun
a position that comes after the decimal point in a decimal. 0.0164 has four decimal places
noun
maths
the difference between one number or measurement in a series and the average of all the numbers or measurements in the seriesnoun
maths
a calculation in mathematics of how many times a number is contained in a larger numbernoun
maths
a small number or letter written above and to the right of another number to show how many times you should multiply that number by itselfnoun
informal
a calculation of the size, value, or amount of something when all the facts are not available to younoun
in mathematics, the number of times that a number must be multiplied by itself in order to produce a particular number
noun
formal
the study or use of numbers and shapes to calculate, represent, or describe things. Mathematics includes arithmetic, geometry, and algebranoun
maths
an arrangement of numbers or symbols in a pattern from top to bottom and from left to right, used for solving problems in mathematicsnoun
a list that shows the results of multiplying all the combinations of two numbers between 1 and 12 together
noun
a set of written signs or shapes that are used in something such as music or mathematics
noun
a calculation of the way that something will change and develop in the future, especially of how fast it will grow or become smaller
noun
maths
a problem or statement in mathematics or logic that must be solved or proved true or falsenoun
an equation in which a variable (=quantity that can represent different amounts) is multiplied by itself once only
noun
maths
a letter representing a number that can change depending on the other numbers in an equationadjective
adverb
noun
adjective
maths
if one mathematical quantity is a function of another, it changes according to how the second quantity changesthe amount by which a number or calculation may be different from the correct one without causing a problem

Open Dictionary
a symbol named after King Adinkra, used in West Africa in fabric and on other items
add a wordMore submissions
Blog
A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.
global English and language change from our blog