I have been looking at eating leaner meat –and have been wondering What exactly does that mean?

I found an answer at eatright.org

What are Considered Lean Cuts of Meat?

There are several cuts of red meat that are considered lean. Cuts that include the words “round”, such as top round or bottom round, or “loin”, such as sirloin, tenderloin and top loin are lean choices. Flank steak is also a lean cut. Also, look for any cut that is labeled 95% lean ground beef. 

Any cut of meat can be made leaner by trimming off visible, solid fat before cooking. Healthy cooking methods include roasting, broiling, grilling, stir-frying, braising, steaming and stewing.