entiretyPronunciation: /ɪnˈtʌɪərəti, -ˈtʌɪəti, ɛn-/Translate entirety | into French | into German | into Italian | into Spanish Definition of entirety noun [mass noun] the whole of something:she would have to stay in her room for the entirety of the weekendPhrases in its entirety as a whole; completely:the poem is too long to quote in its entirety hereOrigin: Middle English: from Old French entierete, from Latin integritas, from integer 'untouched, whole' (see entire). Compare with integrityentirety in other Oxford dictionaries Definition of entirety in the US English dictionary