Definition of "merely"

It is not forgot, since the acute and distinct Arminius was perverted meerly by the perusing of a namelesse discourse writt'n at Delf, which at first he took in hand to confute.

1644, John Milton, Areopagitica

I am sorry to say, that I doubt if there is a judge in Massachusetts who is prepared to resign his office, and get his living innocently, whenever it is required of him to pass sentence under a law which is merely contrary to the law of God.

1854, Henry David Thoreau, Slavery in Massachusetts