number

Từ điển Oxford Learners Wordfinder Dictionary

1 whole numbers
2 numbers that show position in a sequence
3 fractions
4 exact and inexact numbers
5 doing things with numbers
quantities HOW MUCH/MANY
measurements SIZE, WEIGHT
the study and use of numbers MATHEMATICS
see also ONE, TWO, HUNDRED

1 whole numbers
- a word or symbol that indicates a quantity: number; adjective: numerical
a number between 10 and 20 ◎ The answers were given in numerical order.
- letters that represent numbers (I, II, III, IV, etc): Roman numerals
- a written sign for a number (0 to 9): figure
Write the number in figures as well as words. ◎ a six-figure number (= between 100 000 and 999 999)
- a number that is used to identify sth: number
What's your telephone number?
- used before a number to show its position in a sequence: number (written abbreviation no)
I live at number 16. ◎ I'm staying at the Grand Hotel in room no 134. ◎ What's the answer to question number one? ◎ What number are you on? (= how far have you got in a list of things to do or questions to answer)
- to give a number to sth: number sth; adjective: numbered
Number each page in order from 1 to 20. ◎ I couldn't put the pages in order because they weren't numbered.
- a number that can be divided by two (2, 4, 6, 8, etc) is an even number
- a number that cannot be divided by two (1, 3, 5, 7, etc) is an odd number
- the number 0: zero, nought, nil
Three, two, one, zero and lift off! ◎ I got nought out of ten in the test. ◎ To write a million you put a one followed by six noughts. ◎ The final score was two nil.
- a number which is less than zero is a negative number; (used about a number) below zero: minus
-2 (minus two) is a negative number.
- a number which is greater than zero is a positive number; (used about a number) above zero: plus
a temperature of plus three degrees
Note: in British English nought is normally used when talking about the figure 0 in numbers; zero is more common in scientific and technical uses; nil is used mainly in talking about scores in sport; O (pronounced oh) is often used in giving telephone numbers.
- the names of the numbers: (1) one, (2) two, (3) three, (4) four, (5) five, (6) six, (7) seven, (8) eight, (9) nine, (10) ten, (11) eleven, (12) twelve, (13) thirteen, (14) fourteen, (15) fifteen, (16) sixteen, (17) seventeen, (18) eighteen, (19) nineteen, (20) twenty, (21) twenty-one, (22) twenty-two, etc; (30) thirty, (40) forty, (50) fifty, (60) sixty, (70) seventy, (80) eighty, (90) ninety, (100) a hundred, (1 000) a thousand, (1 000 000) a million, (1 000 000 000) a billion
- a group of twelve: dozen (plural dozen); six or a group of six: half a dozen
a dozen eggs ◎ three dozen bottles of wine
Note: in numbers greater than a hundred, we say and before the last part of the number:
sixty-two ◎ three hundred and two ◎ two thousand three hundred and two ◎ two million six hundred thousand five hundred and ninety-five.
- We usually use a rather than one for numbers between a hundred (100) and a hundred and ninety-nine (199) or for a thousand, a million or a billion:
There are a hundred and fifty people in the school ◎ 'How many have you got left?' 'About a thousand.' If the number needs to be emphasized, we use one:
There are exactly one hundred tickets left. ◎ 'Did you say five hundred?' 'No, one hundred.'; but we usually use one with numbers greater than a thousand, a million or a billion:
one thousand, three hundred and sixty (1 360).
- Numbers between 1 100 and 1 999 can be spoken as hundreds, especially in informal usage:
eleven hundred (1 100). Dates are always written in numbers. When we say dates between 1 001 and 1 999, we usually omit hundred:
in 1066 (ten sixty-six) ◎ 1789 (seventeen eighty-nine).

2 numbers that show position in a sequence
- a number that shows the position of sth in a sequence: ordinal (number)
- the names of the ordinals: first (1st), second (2nd), third (3rd), fourth (4th), etc; twenty-first, twenty-second, twenty-third, twenty-fourth, etc; hundredth; thousandth; millionth; billionth
- introducing the first point on a list: first, firstly
- introducing the second, third, fourth, etc point on a list: second (or secondly), third (or thirdly), fourth, etc
I'll tell you why I'm leaving - firstly, I've got a new job; and secondly, I 'm going to get married.

3 fractions
- a number that is not a whole number (for example, ※µ※„※‚†): fraction
- a fraction expressed in tenths (for example, 0.75): decimal
- the dot used in a decimal: decimal point

• Từ đồng nghĩa / Synonyms:
  identification number, issue, numeral, phone number, telephone number, act, routine, turn, bit, figure, keep down, count, enumerate, numerate, list, total, add up, come, amount