Supplementary in a Sentence Definition of Supplementary something that is added to something else Examples of Supplementary in a sentence This income is supplementary to my regular job, and I enjoy the chance to earn extra money. Our church offers supplementary programs to the traditional services such as Christian counseling.

that is provided, needed, or asked for in addition to something else: Also included will be supplementary liability insurance, often up to $1 million, as protection against claims from any third parties. A supplementary budget may be needed to cover the cost of repairs.

added to something else in order to improve it or complete it: Teachers often create supplementary materials for their classes. Some workers are eligible for supplemental unemployment benefits.