Calm and not likely to change suddenly, in a steady and well-balanced situation (the keel is the bottom of a boat or ship and when the boat is on an even keel it is balanced).
The new department was running on an even keel soon after it opened.
Calm and not likely to change suddenly, in a steady and well-balanced situation (the keel is the bottom of a boat or ship and when the boat is on an even keel it is balanced).
The new department was running on an even keel soon after it opened.