A unicorn company is a start up, which is not public yet, that has been valued more than 1 billion in the last funding round.
Reported growth and operational growth both represent the growth in revenues over the previous year but differ for a key element: reported growth is the the growth in revenue as represented in compliance with accounting standard; operational growth is the revenue growth that strips out the effect of currency fluctuations, mergers and acquisitions (M&A) and divestments. You might be interested in: Operational growth