What is "ruminatively"

Usage examples of "ruminatively".

White sunlight shone on pelts the colour of new copper wire as they plodded up the hill, ruminatively uncomplaining.

Then Adams ambled back to the White House, ruminatively cracking peanuts and eating them, and wondering what Philip Nordstrom, a conspirator who held a small clerkship in the office of the Comptroller General, would be able to learn on the subject of cholesterol.