Definitions

1. pronoun

used as the object of a verb or preposition, referring to the thing or person previously mentioned

“She looked at the painting itself, not the frame.”

2. noun

the thing or person previously mentioned

“The hotel itself was not the problem, but the service was terrible.”

3. adverb

used to indicate that something is the thing or person previously mentioned

“The company is known for its own products, not itself.”