What is definite pronoun with examples?

The term 'definite' pronoun is not used for English pronouns; there is a category of indefinite pronouns, so all of the other pronouns would be definite pronouns. The other pronouns are:

personal pronouns; I, you, we, he, she, it, me, us, him, her, they, them.

demonstrative pronouns: this, that, these, those.

possessive pronouns: mine, yours, his, hers, its, ours, theirs.

possessive adjectives: my, your, his, her, their, its.

interrogative pronouns: who, whom, what, which, whose.

reflexive pronouns: myself, yourself, himself, herself, itself, ourselves, yourselves, themselves.

reciprocal pronouns: each other, one another.

relative pronouns: who, whom, whose, which, that.

The indefinite pronouns are: all, another, any, anybody, anyone, anything, both, each, either, enough, everybody, everyone, everything, few, fewer, less, little, many, more, most, much, neither, nobody, no one, nothing, none, one, other, others, several, some, somebody, someone, something, such, and they (people in general).