1. A supporting pillar consisting of a base, a cylindrical shaft, and a capital. 2. a column of mercury in a thermometer. 3. One of two or more vertical sections of typed lines lying side by side on a page and separated by a rule or a blank space. 4. A feature article that appears regularly in a publication, such as a newspaper. 5. A formation, as of troops or vehicles, in which all elements follow one behind the other. 6. A columnlike structure, especially one formed by the union of a stamen and the style in an orchid flower, or one formed by the united staminal filaments in flowers such as those of the hibiscus or mallow. 7. the vertebral column.