- The part of the body cavity from the thorax to the pelvic girdle, containing the digestive organs, etc.; belly: in mammals, the diaphragm separates this from the thorax.
- The region of the trunk between the chest and pelvis.
He was all bent over complaining of pains in the abdomen.
An example of abdomen is the area that you exercise when doing a sit-up.
Other Word Forms
Origin of abdomen
- Latin abdōmen belly dhē- in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition