Definition of archival in English:

archival

adjective

  • 1Relating to or constituting archives:

    ‘the club maintains an archival research library’
    1. 1.1 (of a material such as paper) of suitable quality to be used in archives:
      ‘the illustrations are printed with archival inks that will last about 70 years’

Pronunciation

archival

/ɑːˈkʌɪv(ə)l/