From Longman Dictionary of Contemporary Englishinterwarin‧ter‧war /ˌɪntəˈwɔː◂ $ -tərˈwɔːr◂/ adjective [only before noun] SHhappening or relating to the period between the First and the Second World Wars the interwar years
Examples from the Corpus
interwar• The medieval, Renaissance and modern collections cover more than a millennium, from the Dark Ages to the interwar period.• Plenty of reckless people found themselves enthusing about dictators during the interwar years. 