What does the underlined word mean in the following sentence and what contextual clue is used? “He was in a mood of complete euphoria, his happiness being the result of an announcement that he had won the sweep-stakes.”

What does the underlined word mean in the following sentence and what contextual clue is used? “He was in a mood of complete euphoria, his happiness being the result of an announcement that he had won the sweep-stakes.”

“EUPHORIA” MEANS (A FEELING OF) HAPPINESS. THE CONTEXT CLUE USED IS SYNONYMY.