Meaning

adjective moderate to inferior in quality

adjective lacking exceptional quality or ability

adjective poor to middling in quality

originFrom the late Middle English medioker, from the French médiocre, from the Middle French médiocre, from the Classical Latin mediocris (“in a middle state”, “of middle size”, “middling”, “moderate”, “ordinary”, from medius (“middle”) + ocris (“rugged mountain”)); compare mediocrely and mediocrity.

Etymology from Wiktionary, CC BY-SA 3.0