Definition as Adjective

• poor to middling in quality
• lacking exceptional quality or ability
• moderate to inferior in quality

• average, fair, middling

• second-rate

• "there have been good and mediocre and bad artists"

• "a novel of average merit"; "only a fair performance of the sonata"; "in fair health"; "the caliber of the students has gone from mediocre to above average"; "the performance was middling at best"

• "they improved the quality from mediocre to above average"

• Mediocre vs average
• Mediocre vs fair
• Mediocre vs middling
• Mediocre vs second-rate