# Quantity vs Countable - What's the difference?

quantity | countable |

## As a noun quantity

is a fundamental, generic term used when referring to the measurement (count, amount) of a scalar, vector, number of items or to some other way of denominating the value of a collection or group of items.

## As a adjective countable is

capable of being counted; having a quantity or a numerical attribute.

# quantity

## English

(wikipedia quantity)

### Noun

(quantities)
• A fundamental, generic term used when referring to the measurement (count, amount) of a scalar, vector, number of items or to some other way of denominating the value of a collection or group of items.
• You have to choose between quantity and quality.
• An indefinite amount of something.
• Some soap making oils are best as base oils, used in a larger quantity''' in the soap, while other oils are best added in a small '''quantity .
Olive oil can be used practically in any quantity .
• A specific measured amount.
• This bag would normally costs $497.50 for a quantity of 250, at a price of$1.99 per piece.
Generally it should not be used in a quantity larger than 15 percent.
• A considerable measure or amount.
• The Boeing P-26A was the first all-metal monoplane fighter produced in quantity for the U.S. Army Air Corps.
• (metrology) Property of a phenomenon, body, or substance, where the property has a magnitude that can be expressed as number and a reference.
• (mathematics) Indicates that the entire preceding expression is henceforth considered a single object.
• x plus ''y'' quantity squared equals ''x'' squared plus ''2xy'' plus ''y'' squared .
• * 2006 , Jerome E. Kaufmann and Karen Schwitters, Elementary and Intermediate Algebra: A Combined Approach , p 89
• For problems 58-67, translate each word phrase into an algebraic expression.
(...)
65. x plus 9, the quantity squared
• * 2005 , R. Mark Sirkin, Statistics For The Social Sciences , p137
• The second, $\left(\sum x\right)^2$, read "summation of x, quantity squared," tells us to first add up all the xs to get $\sum x$ and then square $\sum x$ to get $\left(\sum x\right)^2$.
• * 1985 , Serge Lang, Math!: Encounters with High School Students , p54
• ANN. $ra$ quantity cubed.
SERGE LANG. That's right, $\left(ra\right)^3$.

#### Usage notes

* In mathematics, used to unambiguously orate mathematical equations; it is extremely rare in print, since there is no need for it there.

#### Synonyms

* Qty

* measure * unit

# countable

## English

(-)
• Capable of being counted; having a quantity.
• (mathematics, of a set) Countably infinite; having a bijection with the natural numbers.
• (mathematics, of a set) Countably infinite or finite; having a bijection with a subset of the natural numbers.
• (grammar, of a noun) Freely usable with the indefinite article and with numbers, and therefore having a plural form.
• #### Synonyms

* (having a bijection with a subset of the natural numbers) denumerable

#### Antonyms

* uncountable

#### Hyponyms

* (having a bijection with a subset of the natural numbers) finite, countably infinite

#### Hypernyms

* (countably infinite) infinite

#### Derived terms

* countable set * countable additivity