411 REFERENCE · Wiktionary
MI9
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
en Military Intelligence, Section 9.
Proper noun
en historical A section of British military intelligence in World War II; they were charged with aiding resistance fighters in enemy territory and recovering Allied troops from behind enemy lines.
Related terms
en MI5
en MI6
Further reading
en World War II