Definition:

Adjectives are the describing words that give a specific information about the noun or a pronoun. An adjective modifies the noun giving a more detailed information about it.
When we talk about more specifications, it relates to age (old, young, etc.), size (big, tiny, giant, small, etc.), shape (round, oval, square, etc.), color (grey, fair, black, pink, etc.), other attributes (good, beautiful, smart, bad, ugly, etc.) , etc.
Ex:- pretty girl. Here, girl” is a noun. But to describe it more specifically, pretty” is used. Hence, pretty” is an adjective.

Examples:

Sentence Adjective Explanation
Sumit is an intelligent boy. intelligent Here, the specification of the noun“boy” is that he is intelligent. Hence,“intelligent” is an adjective.
I have an elder brother. elder “elder” reflects the age of noun“brother”. Hence,“elder” is an adjective.
Roses in my garden are red. red “red” reflects the color of the noun“roses”. Hence,“red“is an adjective.
Kusum wore a beautiful dress. beautiful Word“beautiful” describes about the noun“dress”. Hence,“beautiful” is an adjective.
Everyone should follow a healthy diet. healthy word“healthy” is a specification of the noun“diet”. Hence,“healthy” is an adjective.

Types of Adjectives:

Type of Adjective Definition Examples
Descriptive Adjectives These are the most common adjectives which frame the basic definition of adjectives. Descriptive adjectives are the attributes or the qualities of a noun or a pronoun. beautiful painting, pretty girl, silly question, bad performance, naughty kid
Demonstrative Adjectives Demonstrative adjectives clearly indicate or point out specific noun or pronoun. It basically describes ‘which’ noun has been referred.
This: it is used to describe nearby singular nouns.
That: it is used to describe far off singular nouns.
These: it is used to describe nearby plural nouns.
Those: it is used to describe far off plural nouns.
this boy, that chair, those kids, these toys
Possessive Adjectives Possessive adjectives reflect ownership of the noun or the pronoun. These words describe a relationship of belonging i.e. to whom it refers to. Some other possessive adjectives are:- my, his, her , their, your, our, etc. Except “his”, none of these adjectives can be used after noun unless and until they are modified. For example, Her- hers, his-his, my–mine, your- yours, their- theirs, our-ours,etc. This is my dog.
OR
This dog is mine.
Quantitative Adjectives They are also known as number adjectives. Quantitative adjectives clearly denote the number of the nouns or pronouns. ten books, two dresses, hundred runs
Indefinite Adjectives These adjectives are used to describe nouns which are not specified. They don’t reflect the exact amount or quantity. many schools, few people, any pen, some fruits
Interrogative Adjectives These adjectives are basically used to ask questions. Mainly three types of interrogative adjectives are used for referring to nouns. They are “which”,“what” and“whose”. which dress?, whose pen?, what time?
Articles Though we study Articles as a separate part of speech, still they are considered adjectives as they are used to describe particularly which noun has been referred to. The three articles are:
A: It is used for singular as well as general things.
An: It is also used for singular and general things . But it is used before only those words that start with a vowel.
The: It is used for both singular as well as plural but specific things.
a ball, a girl, an apple, an umbrella, the sun, the moon
I don’t understand the concept. Here, we are talking about a particular concept. Hence,“the” is used as an adjective.
Distributive Adjectives These adjectives are mainly used when we seclude one or more items from the whole group. When we talk about secluding items, it can be acceptance as well as non-acceptance. each, either, none, any, neither
Neither of the two was selected.
Each girl sang National Anthem.