is constant a noun or an adjective?

Answer 1

Both.
In mathematics, a constant is a value that does not change - noun.
In Physics, an object can be described as constant acceleration (gravity), where constant is the adjective for acceleration.

Answer 2

It depends on the context or usage of the word.

For instance if you are using it in the mathematical sense, y = 3 is a constant. (A mathematical constant is a value that does not change.) Then it is a noun, specifically a thing you can talk about. The constant was small. We used constant in the context of a noun as the subject of that sentence.

The stars in the sky were a constant to sailors and aided them in navigation. (used as a noun, a thing representing things)

Or, you can use it as an adjective describing a noun. Let's use y again. Y was constant. X was green. Z was furry.

The stars in the sky were a constant navigation aid to sailors. (used as an adjective to modify another adjective describing what kind of aid) ( the kind of aid was described as the navigation, the navigation was constant describing the navigation type as being all the time)

Answer 3

The word "constant" could be an adjective or a noun depending on how it is used.

Constant as adjective: to stand firm, be consistent
Example:You are my constant asker.
Constant as noun: something invariable or unchanging
Example: My answer to your question is constant.

Answer 4

It can be a noun as in something that is unchangin "gravity was used as the constant in the experiment". It can be an adjective as in "She found it impossible to concentrate with constant interruptions". Or it can be an adverb "he is constantly getting on my nerves".

Answer 5

It can be both. It is an adjective in the sentence "This itch on my arm is a constant bother." It is a noun in the sentece "The letter K in that equation is a constant, because it never changes." Hope that helps :)

Answer 6

It is confusing but it is both and by changing the word to constant--ly it then becomes an adverb.
You have to determine at what part of a sentence it will be used

con·stant (knstnt) KEY

ADJECTIVE:
Continually occurring; persistent.
Regularly recurring: plagued by constant interruptions.
Unchanging in nature, value, or extent; invariable. See Synonyms at continual.
Steadfast in purpose, loyalty, or affection; faithful. See Synonyms at faithful.
NOUN:
Something that is unchanging or invariable.

A quantity assumed to have a fixed value in a specified mathematical context.
An experimental or theoretical condition, factor, or quantity that does not vary or that is regarded as invariant in specified circumstances.


ETYMOLOGY:
Middle English, from Old French, from Latin cnstns , cnstant- present participle of cnstre, to stand firm : com-, intensive pref. ; see com- + stre, to stand; see st- in Indo-European roots

OTHER FORMS:
constant·ly (Adverb)
Thesaurus: synonyms for constant

http://education.yahoo.com/reference/dictionary/entry/constant

Answer 7

It can be both. The noun version is something that is consistent and always the same, the verb is...well the same, just in a descriptive context.
Verb
Eg. She is a constant irritation.
Noun
Eg. In mathematics the constant can be denoted by c.

Answer 8

it can be both, constant as in something that stays the same is a noun and "i'm sick of your constant whining" it is an adjective

Answer 9

Constant is an adjective meaning changeless or ongoing.i.e.the constant nagging, the constant noise.

Answer 10

Depends on your definition, of course. In Science a "constant" is a variable in an experiment. So, in such a case it would be a noun. "What was the constant in that experiment?"

It can also be used as an abjective or an adverb. "I constantly use lotion for my dry skin." "The repeating pattern on that page is very constant."

So, in short its both.