Defination of parts of Speech:-
" Words which are divided into different kinds or classes, according to
their uses or according to the work they do in a sentence, is called PARTS OF SPEECH.
eight parts of speech.

1) Noun. 5) Adverb.

2) Pronoun. 6) Pre-Position.

3) Adjective. 7) Conjunction.

4) Verb 8) Interjection