overwork(noun, verb) noun1. the act of working too much or too long- he became ill from overworkSimilar word(s): overworkingDefinition categories: act, labor, labour, toil verb1. use too much- This play has been overworkedDefinition categories: creation, process, work2. work excessively hardSimilar word(s): exploitDefinition categories: social, workSentences with overwork as a verb:- to overwork a horse