Introducing a list. The colon is used to introduce a list of items. The bookstore specializes in three subjects: art, architecture, and graphic design. Do not, however, use a colon when the listed items are incorporated into the flow of the sentence.
Definition of medal for Students. : a piece of metal often in the form of a coin with design and words in honor of a special event, a person, or an achievement.
The commemorative medals now awarded by Congress to specific individuals are designated as national medals and are awarded in gold. However, from time-to-time Congress also creates military commemorative medals that recognize all individuals who participate some special event or circumstance.