Above Full-Employment Equilibrium

What Does Above Full-Employment Equilibrium Mean?
A macroeconomic term used to describe the real gross domestic product (GDP) is currently in excess of its long-run average, or some other historical measure. Accordingly, the amount that the current real GDP is greater then the historic average is called an inflationary gap, as this will create inflationary pressures in this particular economy.

Investopedia explains Above Full-Employment Equilibrium
Above full-employment equilibrium simply means that a given economy is producing goods, as measured by its GDP, at a higher level then it usually does. Because this market is in equilibrium, there will not be any excess supply in the short run, but this overly active economy will create more demand for goods and services, which will push prices upwards and possibly, lead to a greater level of inflation.