00More optionsShareSaveReportVideo vocabularyNo vocabulary matches your filtersfactUS /fækt/・UK /fækt/Noun (Countable/Uncountable)Something that is known or proved to be trueA1More bigUS /bɪɡ/・UK /bɪɡ/AdjectivePopularSeriousA1More sirUS /sɚ/・UK /sɜ:(r)/NounForm of polite address to a man you do not knowTitle used to address men with authorityA1More mmUS ・UK InterjectionSomething you say when you are satisfiedA1More Use EnergyUnlock All VocabularyUnlock pronunciation, explanations, and filtersUnlock