Definition of interfile in English:

interfile

Pronunciation /ˌin(t)ərˈfīl/ /ˌɪn(t)ərˈfaɪl/

transitive verb

[with object]
  • 1File (two or more sequences) together.

    • ‘the index interfiles books and their authors in one alphabetical sequence’
    1. 1.1File (one or more items) into an existing sequence.
      ‘this index is interfiled with the main card catalog’
      • ‘In both the electronic and print examples, form subheadings are interfiled with topical ones; librarians often separate these.’