Definition of "disingenuous"

I am not so vain as to think these Remarks free from faults, nor so disingenuous as not to confess them:

1726, William Broome, edited by Maynard Mack, The Poems of Alexander Pope: The Odyssey of Homer. Books XIII-XXIV, volume 10, Methuen, published 1969, page 378

But was it responsible governance to pass the Longitude Act without other efforts to protect British seamen? Or might it have been subterfuge—a disingenuous attempt to shift attention away from the realities of their life at sea.

2012 March, William E. Carter, Merri Sue Carter, “The British Longitude Act Reconsidered”, in American Scientist‎, volume 100, number 2, page 87