OVERENTHUSIASTIC Meaning of OVERENTHUSIASTIC in English | ̷ ̷ ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ adjective : unduly or extremely enthusiastic Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012