IPA: /ˌvælɪdɪkˈtɔːriən/
KK: /ˌvælɪdɪkˈtɔːriən/
A student who has the highest grades in their class and gives a speech at graduation.
She was named the valedictorian of her class and delivered a heartfelt speech at the ceremony.
Valedictorian → It is formed from "vale" (from Latin *vale*, meaning farewell) and "dictorian" (from Latin *dicere*, meaning to say or speak). The word refers to the person who delivers a farewell speech, typically at a graduation ceremony.
Think of someone 'saying farewell' ('vale' means farewell and 'dicere' means to say') — that's why a valedictorian is the one who gives a farewell speech.