Just wondering what the exact definition of exclusively breastfeeding is......

Does it mean that you do not pump or feed your LO pumped milk, you only offer breast? In my mind, if a baby is only given breastmilk, even if it is from a bottle every time, he is "exclusively breastfed."

I give may LO one bottle of pumped milk a day....does this mean I do not exclusively breastfeed?