tin hat From WikiWord Entry Discussion Read Edit View history Contents EnglishPronunciationNounRelated termsReferences English Pronunciation No pronunciation has been added yet. Nountin hat nounThe steel helmet worn by soliders during World War I.Tinfoil hat Related termsSynonymshard hatsafety hatpot hatcampaign hatwashbasin helmettop hattilebarretservice hatcapelinesteel pot helmetgreat helmkettle hatpickelhaubecapellinetrencher cap References Wiktionary — tin hat Wikipedia — tin hat