cohere, cohered, cohering 1. To cleave or stick together; especially said of the constituent parts of a material substance. Said of the substance, mass, or body whose parts so stick together. 2. To stick or hold together in a mass that resists separation. 3. When referring to people: to stick together; to unite or remain united in some action. Found on http://www.wordinfo.info/words/index/info/view_unit/976/