really really /ˈriːli/

adverb

1. () In accordance with truth, fact or reality  ( veritably , genuinely , truly , really )
   in accordance with truth, fact or reality
    She was now truly American
   she was now truly American
    A genuinely open society
   a genuinely open society
    They don't really listen to us
   they don't really listen to us
   
2. () In actual fact  ( actually , really )
   in actual fact
    To be nominally but not actually independent
   to be nominally but not actually independent
    No one actually saw the shark
   no one actually saw the shark
    Large meteorites actually come from the asteroid belt
   large meteorites actually come from the asteroid belt
   
3. Used as intensifiers; real' is sometimes used informally for really'; rattling' is informal  ( rattling , really , real , very )
   used as intensifiers; real' is sometimes used informally for really'; rattling' is informal
    She was very gifted
   she was very gifted
    He played very well
   he played very well
    A really enjoyable evening
   a really enjoyable evening
    I'm real sorry about it
   I'm real sorry about it
    A rattling good yarn
   a rattling good yarn
   
4. In fact (used as intensifiers or sentence modifiers)  ( really , truly , in truth )
   in fact (used as intensifiers or sentence modifiers)
    In truth, moral decay hastened the decline of the Roman Empire
   in truth, moral decay hastened the decline of the Roman Empire
    Really, you shouldn't have done it
   really, you shouldn't have done it
    A truly awful book
   a truly awful book
   

interjection

1. () Colloquial expressions denoting either genuine or feigned surprise or interest.  ( izzit [Informal, South Africa] , really )
   Colloquial expressions denoting either genuine or feigned surprise or interest.