Definition of commitment fee in English:

commitment fee

noun

  • 1A fee paid upon the committal of a person into custody, especially (in early use) by a new prisoner to the warden of the prison in return for private accommodation and other privileges (now rare).

  • 2Finance a fee charged by a bank to keep open a line of credit or to continue to make existing loan facilities available to a potential borrower.

Origin

Mid 17th century.