A mediocrity is someone or something that's average and not exceptional. It can also describe work or results that are only ordinary.
When people talk about mediocrity, they often use it to criticize something that's not living up to its potential. For example, if a movie gets a bunch of mediocre reviews, it means the critics thought it was okay but nothing special. You might say someone is being mediocre at their job if they're just getting by and not really doing anything impressive. Some people even use the word to describe themselves when they feel like they're not as talented or skilled as others in a particular area.
The quality of being intermediate between two extremes; a mean.
