OVERCLASS Meaning of OVERCLASS in English ¦ ̷ ̷ ̷ ̷ ¦ ̷ ̷ nounEtymology: over (III) + under class (herein): the highest social stratum in a society : upper class — compare underclass herein Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012