| upside down | |
| —adj | |
| 1. | (usually postpositive; upside-down when prenominal) turned over completely; inverted |
| 2. | informal (upside-down when prenominal) confused; muddled; topsy-turvy: an upside-down world |
| —adv | |
| 3. | in an inverted fashion |
| 4. | in a chaotic or crazy manner |
| [C16: variant, by folk etymology, of earlier upsodown] | |
| upside-'downness | |
| —n | |
| a chattering or flighty, light-headed person. |
| a scrap or morsel of food left at a meal. |