| 1. | a large photograph, as of a sexually attractive person, suitable for pinning on a wall. |
| 2. | a person in such a photograph. |
| 3. | a device or fixture that is fastened to a wall, as a lamp. |
| 4. | of, pertaining to, or appearing in a pinup: a pinup girl. |
| 5. | designed or suitable for hanging or fastening on a wall: a pinup lamp. |
