for or by a group rather than individuals; "dipping each his bread into a communal dish of stew"- Paul Roche; "a communal settlement in which all earnings and food were shared"; "a group effort"
Communal means relating to particular groups in a country or society. Communal violence broke out in different parts of the country. inter-communal relations
You use communal to describe something that is shared by a group of people. The inmates ate in a communal dining room. communal ownership. + communally com·mu·nal·ly Meals are taken communally in the dining room