Definition of "lyon"

The wicked flee when no man pursueth: but the righteous are bolde as a lyon.

1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], Proverbs 28:1

Furious as a lyon the fitt comes one, but retires gentle as a lamb.

1734, William Stukeley, Of the Gout, J. Roberts, page 103