Definitions of barrier to entry
(often plural: barriers to entry) anything that stops new firms from competing on an equal basis with other firms in an industry; anything that stops or makes it difficult for a new firm to enter a particular market
Non-uniform standards are a real barrier to entry for many businesses in the computer industry.
anything that stops or makes it difficult for a person to have access to a particular place, group, or institution etc
We believe that a $70 fee for what many use as a day pass would create a barrier to entry.