mediocrity

noun

1. (uncountable)The condition of being mediocre; having only an average degree of quality, skills etc.; no better than standard.

   “Flexibility is good, but a tolerance for mediocrity carried far enough impairs operational capacity.”

   “England captain Harry Kane lifted the mediocrity of an attritional first half on a slow surface when he scored his 33rd goal for his country, a superbly guided diving header from Luke Shaw's cross seven minutes before the interval.”

2. (countable)A person with mediocre abilities or achievements.

   “populated with mediocrities”

   “surrounded by mediocrities”

3. (archaic, countable, uncountable)The quality of being intermediate between two extremes; a mean.
4. (countable, obsolete, uncountable)A middle course of action; moderation, balance.

   “Sundrie other Gent[lemen] reſt beholden to this hundred, for their dvvellings, vvho, in an enuiable mediocritie of fortune, do happilie poſſeſſe themſelues, and communicate their ſufficient means to the ſeruice of their prince, the good of their neighbours, and the bettering of their ovvn eſtate: […]”

   “In adversity I wish for prosperity, and in prosperity I am afraid of adversity. What mediocrity may be found?”