A relational symbol representing "much greater than" or triple comparison in ordered sets and inequalities.
Examples
Comparing orders of magnitude
10^6 \ggg 10^3
Growth rate comparison in asymptotic analysis
n^3 \ggg n\log n
Comparing infinitesimals in analysis
1 \ggg \frac{1}{n} \ggg \frac{1}{n^2} \text{ as } n \to \infty