part of speech
nounUK /ˌpɑːt əv ˈspiːtʃ/
US /ˌpɑːrt əv ˈspiːtʃ/
A part of speech is a group that a word belongs to, like noun or verb.
In the sentence 'Birds fly,' 'birds' is a noun and 'fly' is a verb, so each word has its own part of speech.
OTHER MEANINGS
2. A role or function that someone or something performs in a particular situation.
In the school play, she had a small part of speech as the narrator.
3. A section of a spoken presentation or talk.
The teacher saved the most important part of speech for the end of the lesson.