What do you class as 'sleeping through the night'

[ToastMakesMeHappy]

Often read about babies/toddlers/children 'sleeping through' but wondering peoples opinions. To me this means something like 7 til 7 or 8 til 6. Something along those lines. What do you think?

5 hours is actually classed as sleeping through.
I can't imagine many little ones can go much longer. To be honest 5 hours of unbroken sleep with a young baby is pretty amazing and a gift when it happens.