| ZO | (anatomy) any encircling or beltlike structure |
|---|---|
| ZO | an area or region distinguished from adjacent parts by a distinctive feature or characteristic |
| ZO | any of the regions of the surface of the Earth loosely divided according to latitude or longitude |
| ZO | a circumscribed geographical region characterized by some distinctive features |
| ZO | separate or apportion into sections |
| ZO | regulate housing in |
| ZO | artillery or mortar fire delivered in a constant direction at several quadrant elevations |
| ZO | dividing an area into zones or sections reserved for different purposes such as residence and business and manufacturing etc |
| ZO | a board of officials who divide an area into zones that are subject to different restrictions |
| ZO | a commission delegated to supervise the zoning of areas for residential or commercial use |
| ZO | fall asleep fast, as when one is extremely tired |
| ZO | lose consciousness due to a sudden trauma, for example |