What is the meaning of admission?

noun

• The act of admitting someone to enter.
  • usage: "the surgery was performed on his second admission to the clinic"
  • synonyms: admittance
• An acknowledgment of the truth of something.
• The fee charged for admission.
  • synonyms: entrance fee, admission charge, admission fee, admission price, price of admission, entrance money
• The right to enter.
  • synonyms: entree, access, accession, admittance