Meaning

• A person of minor significance, accomplishment or acclaim; a common and undistinguished person.

• A member of a socioeconomic class between the upper ranks of society and the agricultural workers.

Meaning

• Having no peculiar or outstanding features; not extraordinary, special, exceptional, or great; of medium quality, almost always with a negative connotation.

  "I'm pretty good at tennis but only mediocre at racquetball."