The part of speech indicates how the word functions in meaning as well as grammatically within the sentence.
Example:
The young girl brought me a very long letter from the teacher and then she quickly disappeared. Oh my!
- NOUN : girl - letter - teacher
- PRONOUN : me - she
- VERB : brought - disappeared
- ADJECTIVE : young - long
- ADVERB : very - then - quickly
- PREPOSITION : from the teacher
- CONJUNCTION: and
- INTERJECTION : oh my!