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.
A campaign medal is generally awarded for participation in a military action in which: Service takes place in a clearly defined, broad area of operations. Large-scale military operations are involved. There are active, opposing, and hostile forces.