E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A corruption of greesing stairs. Greesings (steps) still survives in the architectural word grees, and in the compound word de-grees. There is still on the hill at Lincoln a flight of stone steps called Grecian stairs.
Paul stood on the greezen [i.e. stairs].Wicliffe: Acts xxi. 40.